How To Start An Engine With A Bad Fuel Pump

Start the engine on the hose before going to the ramp and check the shifting and all your gauges for proper opertation. · PTO engaged. This means taking your boat and motor to a nearby body of water, tying the boat to the dock, rigging the test equipment. Once you determine your Fuel Pump is bad These are the processes I went through Link to the thread 12/1995 Explorer V-6 4. This is also recommended in colder climates aswell because if enough water is in the fuel tank it can freeze around the fuel pump and prevent it from starting. Why does the start of injection retard when engine load is reduced? the high pressure fuel pump provides pressure for fuel injection. ) Running winter fuel in warm weather. Problem #4 – Bad Injector Timing. Also includes links to relevant forum topics on the code. How do I know if I have a fuel pump problem with my car. Fuses are used to protect various electrical circuits while supplying power to components. Normally mounted on the fuel tank, the fuel tank pressure sensor is a part of the fuel pump and the evaporative emissions system that detects the pressure in the fuel tank and sends the information to the vehicle's computer system for fuel consumption regulation. So here are some simple steps you can take to nip. So it's a no-brainer that a malfunctioning fuel pump is bad news. We replaced the PCM module, ignition control module, fuel filter, PCM diode with no luck. The tank should be at least 1/4 full to provide enough fuel for proper fuel pump lubrication and cooling before starting the vehicle. Turned out to be a loose ground wire on the fuel pump (or so I was told). If the engine seems to be starving out, check the ignition system first. A bad fuel pump can also prevent fuel from reaching the carb. It also detects leaks in the fuel system. Symptoms of a Bad Fuel Pump. Start the engine. This is also recommended in colder climates aswell because if enough water is in the fuel tank it can freeze around the fuel pump and prevent it from starting. A dead fuel pump can prevent an engine from starting, but so can a problem with the ignition system or the engine itself (such as a broken timing belt). Just FYI, I had a 1999 Pontiac Grand Prix GTP (same basic engine and transmission I think, GM 3800 Series II engine) that the fuel pump relay went bad on. Had to be towed to Nissan. Rail was ok though That unit is over 2k alone, and injectors new are 700 plus alone. that should be good for a low. Symptoms of a bad fuel pump What are the symptoms of a bad fuel pump. Replenish your vehicle's fuel tank and restart it, checking for all of the above signs of a bad engine. this sends gas towards the engine the 2nd pump is the high pressure fuel pump. (4) At this time, release the Starter and advance the Mixture, consider using the Fuel Pump as necessary, if surging occurs. One way to rule this out is to check the fuel bowl for fuel before and while cranking. The Boating Forum - What are the symptoms of a weak/bad fuel pump? - I have been having fits with this engine, but I have a feeling I nearly have them. Well, it takes 3 things for an engine to run: Compression Air/Fuel mixture Spark. So it's a no-brainer that a malfunctioning fuel pump is bad news. Turn the engine ignition key and observe the fuel line for gasoline flow. 1996 chrysler cirrus lx 2. Current and ground along with no fuel pressure suggest a bad fuel pump. When a fuel pump fails completely, absolutely no fuel can reach the engine, and therefore the car will not work. If the fuel pressure drops AFTER the pump stops, this reduction of pressure on the fuel rail will cause bad starts. If there is air in the fuel, move the clear line to the next available location in the supply line from the fuel tank, such as a primary filter, hose connection at a tank switch valve, ETC. The ground and fuel-level sensor return both use a black wire. If fuel spurts out, there is a carburettor fault (See Checking and cleaning an SU carburettor). At the same time I changed the fuel filter. Fuel Pump Rebuild Kit for Johnson Evinrude Outboard. Symptoms can include your car failing to start or accelerating poorly. Will crank good, the fuel pump is new and can hear it when suppose to, new fuel filter, relay and fuses good. This is where fuel filters come into play. You may need to eventually pump it out (landscapers may take it off your hands) and start fresh. If this happens there is no fuel to combust and the engine won't start. How To Tell If A Fuel Pump Is Bad. After reading this, you should understand the importance of the fuel pressure regulator and also a lot of signs of one failing. Replace your fuel pump at University Kia near Cullman, AL 35058 for your Kia Rio. I just changed the fuel pump on my 98 Isuzu Rodeo and now it wont start. Voltage controller to the pump is bad. 7 v8 4 wheel drive that cranks over and over but won't start. FWIW, I had fuel pump issues a few years ago. Horrid smog emitted from exhaust on start up. Clogged filters can. This may cause the pump to produce the loud humming sound besides stalling along the way. ) The Engine Stops Shortly After Start-Up One of the most common. It then sends an electrical signal to the fuel injector that tells it how long to stay open and how much fuel to allow to pass. The fuel was being sucked out of the the carb bowl and back to the the gas tank. I the engine will turn over but not start I would be suspect of a weak fuel pump. Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem. Obtain fresh fuel. Water or dirt in fuel system 5. However doesn’t explain the hard start and rough running then running normally the rest of the day??. I'm pretty sure it's a bad fuel pump by now. It is part of the control system of a fuel pump and its failure can lead to start up problems. Note: The PMD is the same thing as an FSD. Contact University Kia for a great deal on a new fuel pump. The diaphragm inside the fuel pump is very delicate and can tear easily. If you can pump the fuel line bulb, and hear the carbs filling up (the bulb should go hard if its working properly), but then it still won't start, your problem is either: a) Not fuel at all but ignition or something worse (blown crank end seals etc) b) Your motor's gulped a heap of water / dirt and all of the jets in the carbs are blocked again. We’ll use a 2010 Buick Enclave as an example. So for those who suspect problems with fuel pumps, check the Spill Control valve. How to re-wire a fuel pump off a relay. Fuel pump runs all the time. · Check that motion control levers are in neutral and roller bearing adjustment is correct. The quality of fuel at various gas stations can differ. The engine is hard to start or does not start. You will need to see how to tell if your fuel filter is bad to make sure you don't have problems down the line, so keep reading oneHOWTO and see how it's done. If it passes this test, the fuel pump relay CONTACTS AND COIL are working. It is the fuel pump that sees to it that gasoline gets from the tank to the engine. It seems like it is not getting any fuel. If after letting the engine cool down it functions appropriately again — only to repeat the behavior — this is a good sign the fuel pump is failing. There are several tell tale signs of a faulty fuel pump, and your will be able to notice all of them without much effort. I just changed the fuel pump on my 98 Isuzu Rodeo and now it wont start. For more tips, including how to check the filter, keep reading our Master Mechanic reviewer's advice!. Every effort will be made to ship orders placed by 4:00 PM same day. 9-liter TDI engine with pump injection system was developed from the existing 109 bhp (81 kW) 1. There are some vehicles with electric pumps where the pump only runs when the engine is being turned over by the starter. This builds up fuel pressure quickly. A dead fuel pump can prevent an engine from starting, but so can a problem with the ignition system or the engine itself (such as a broken timing belt). 9 round wire on relay won't click off after 5 seconds fuel pump keeps running. Remove the fuel line from the carburetor’s inlet and secure it over the catch pan to prevent spilling gasoline onto the ground. If you do not hear a light buzz sound when the ignition key is turned, fuel is likely not making it to the engine. The ECM has detected that fuel pressure is lower than commanded pressure. While there is also the chance that the problem is with the filter, your best bet is to have the fuel pump checked as soon as possible, so the uneven. Contributed By: Enginebasics. A lack of fuel pressure does NOT necessarily show a bad fuel pump. Remove the fuel injection pump. This replaced what was essentially a BB and a ball point pen spring inside the fuel pump which maintained residual fuel pressure while the engine is at rest. The engine turns over but when I turn the key back it turns over very slowly, veryyyy slowly about 3 times and thats it. Then started fine, then wouldn't start ect. When this problem first occurs, it will probably take a couple attempts cranking the engine before it starts. The mechanic said it was a bad fuel pump. 7L GM with the Spider Fuel Injector Assembly. ive encountered this with common rail cummins. As someone suggested, you could also try to run on a small tank of fresh gas to make sure it is the fuel. How to check fuel injector pulse using a noid light This is a awesome test because it can be done very fast using a very inexpensive tool called a Noid light. Install a spare length of hose on the barb and run the other end into a can on the ground. Signs for bad Spill Control valve: 1. " Crank engine to clear cylinders of excess fuel. Fuel Flow Diagram Fuel Pump Delivery Pressure Low - Data Valid but Below Normal Operational Range Page 1 of 20. Part 2 more detailed causes. This is a craftsman garden tractor in this particular tractor comes with a twin cylinder Kohler pro 25 horse power engine it’s a carbureted engine. Replace the fuel pump check valve with one that meets the specifications of your vehicle. My golf cart will not start this spring. Fuel Flow Diagram Fuel Pump Delivery Pressure Low - Data Valid but Below Normal Operational Range Page 1 of 20. If the fuel pressure drops AFTER the pump stops, this reduction of pressure on the fuel rail will cause bad starts. What would cause 1995 Chevy blazer to run for 20 minutes, then stop and not start again? Installed new fuel pump. The fuel pump relay's circuitry opens and sends roughly 12 volts of power to the fuel pump. Average repair cost is $1,180 at 51,700 miles. A faulty fuel pump can lead to a wide range of symptoms and engine performance problems. Replenish your vehicle's fuel tank and restart it, checking for all of the above signs of a bad engine. has a new battery, seems ok on electrical. If a lift pump is going bad and failing to supply the proper amount of fuel to the injection pump, then the truck will hard start due to lack of fuel. Some fuel systems, especially turbo charged applications, increases the voltage to the fuel pump. Since these engines are all electronic, special equipment is needed to diagnose the problem. If your system doesn't have a Schrader valve and the engine doesn't start, remove the fuel pump fuse, crank the engine for a few seconds. Possible reasons for this include a faulty fuel pump, disconnected or damaged wiring to the pump, or a faulty MPI relay, among a few other things. How To Tell If A Fuel Pump Is Bad. If you do not hear that, there may be a failed relay, fuse, or fusible link, or even a bad fuel pump. 9-liter TDI engine with a distributor injection pump and no intermediate shaft. If no fuel, or only a dribble, emerges, either there is a blockage or leak somewhere in the fuel line (See Checking fuel pipes) or the fuel pump is not working. Note that there are seals of the same type on the injection pump return line at the injection pump and at the return line collector fitting on the rear of the engine (some applications). Sudden trouble accelerating can also be a sign that you have a bad fuel pump. In this video I show how to test for a bad fuel pump in one quick and easy step. 5l v6 Lately my car has ben blowing fuses,specifically the ignition/fuel pump fuse. If you have a bad fuel pump, it is very possible to start the car, but this should be avoided since the motor and pump will likely become burned out. Crank the engine and observe the line. If it will start by adding fuel to the throttle body and stay running afterward, then you have a bad fuel pump. It is attached to the side of the engine--- it is in the area below the throttle body. Obtain fresh fuel. Symptoms of a bad fuel pump are an immediate cause for concern, as it can adversely affect the working and long-term efficiency of the automobile. It is part of the control system of a fuel pump and its failure can lead to start up problems. The first thing to check would be spark. Start the engine. In this article we'll cover the basic operation, diagnosis of the problem and some tips for replacing the sensor and testing the circuit before you put things. Is there some kind of test to make sure if it is the fuel pump or something else that is bad? Can you temporarily. Finally, any water in the fuel system that freezes will prevent engine starts. Is your fuel pump causing you problems? Although replacing it will get you dirty, the process is easy to do. The FPR holds pressure at one end of the fuel rail and the fuel pump non return valve the other. This lubricates the bearings, allows the use of higher-capacity fluid bearings and also assists in cooling the engine. Fuel injected engines are VERY fussy about fuel supply and fuel pressure. On many automobiles, the fuel pump actuator arm passes through the timing case cover. The pressure may be fine while the pump/engine is running but during starting, a loss of pressure AFTER the pump turns off will cause bad starts. Normally mounted on the fuel tank, the fuel tank pressure sensor is a part of the fuel pump and the evaporative emissions system that detects the pressure in the fuel tank and sends the information to the vehicle's computer system for fuel consumption regulation. Check them all. Dodge Ram 2002-2008: How to Replace Fuel Pump. Then try starting the vehicle. fuse under hood also,. Without the injector tip being clamped against the cylinder head, the fuel will simply leak out around the shell of the tip. In a typical modern-day vehicle, the fuel pump is a small electric pump, much like one you might use in a flooded basement. If fuel comes out, it isn't the pump. Fuel Pump Figure 1. It gets plenty of fuel, fuel pressure 40 lbs and hold, when relay switch by passed. If it starts you may have found the problem. I have changed fuel pump,fuel filter,fuel relay,starter relay, and fuel pressure regulator. I got it started twice and only after I saw the engine light come on and heard the 2 second fuel pump whine. Kohler Engines and Parts Store : Kohler Fuel Pumps - Misc Engines & Parts Shipping Option Tecumseh Engine Parts Denso Spark Plugs Oregon Equipment Parts AYP / Electrolux Zama Carburetors & Parts Walbro Carburetors & Parts Kawasaki Engine Parts Kohler Engines / Parts Tillotson Carburetors & Parts Stens Equipment Parts Warner Electric PTO Clutches Ogura Electric PTO Clutches Oregon Chainsaw. Might be ignition or fuel system problem. A bad fuel pump can also prevent fuel from reaching the carb. I have a 98 Chevy truck 1500 v8 350. But will not start. Modern vehicles have several things that can disable the fuel pump. Dirty fuel will cause premature parts failure in equipment of any age. If there is fuel present in these locations, or if the pump is simply providing fuel to the engine, then follow the steps below to inspect and replace the pump. From there, the high pressure fuel pump pressurizes the fuel enough to spray the fuel into the combustion chamber. Fuel injectors are used in all modern engines, and are a vital component in the fuel management system. One day, a fuel pump just stops working and the engine cranks, but doesn't start. As a result, The engine will not start. And here is the fuel pressure reading after turning the key on and priming the system. In fact, within days of picking up the car, I encountered random no-start conditions. Engine Not Starting- If the fuel filter has become so contaminated that the minimum amount of fuel has not been let through it, the engine won't start at all. If battery is too low, it won't engage the fuel pump which is electric and controlled at the ECM. Check the fuel pump. 9 round wire on relay won't click off after 5 seconds fuel pump keeps running. A worn or clogged pump can also make an engine hard to start. The car would start and idle, but as soon as you put it in drive or pressed the gas, the engine would die. Related Discussions and Site. The pump bolts to the engine block; as the engine turns over, a rod presses into a diaphragm inside the pump, causing suction. If my fuel pump goes bad is there any way to start the car in order to get it to the shop? Also, is there some kind of way to tell if it is the fuel pump that is bad? My car keeps cranking, but it won't start. Here are a few examples I witnessed while monitoring the fuel pressure at the fuel rail schrader: 1. Take some out of the tank, put it in a clear jar, a google bad fuel. 3L IDI V8, the Power Stroke/T444E is a completely new engine, with only its bore and stroke dimensions common with its predecessor (resulting in its identical 444 cu in (7. Turning key (fuel pump) on and off 2-3 times before cranking seems to help allot. On many automobiles, the fuel pump actuator arm passes through the timing case cover. Make sure that you follow the engine startup procedure in your manual, or as outlined in the article above, and set the throttle control into the choke/start position if there is one. The tank should be at least 1/4 full to provide enough fuel for proper fuel pump lubrication and cooling before starting the vehicle. Dissecting fuel pump replacement cost. today went got ignition switch and ignition module no luck will not stay running. Fuel pressure test. If i keep driving my truck with the bad fuel pump could it eventually cause damge to the engine or anything else? The mechanic said it wouldnt but if i kebt driving it the fuel pump would just stop working completely and i wouldnt be able to start the truck. This is one of the most common symptoms of a faulty fuel pump. Pending failure can often be detected by high pump noise while they are running or poor engine performance and hard starting. --But to be certain have the fuel pressure check at the rail. When these fuses blow the system they support stops working and the engine stops running. Here are a few examples I witnessed while monitoring the fuel pressure at the fuel rail schrader: 1. A faulty fuel pump can cause poor engine performance and hard starting problems. If the flow to the fuel injection system in the vehicle is not consistent, the engine may develop problems. 1996 chrysler cirrus lx 2. This is a common diesel fuel injector pump glitch, and usually requires a complete injection pump rebuild or replacement. The engine is actually lacking fuel so it is dying and then starting back up again. Replaced fuel pump, checked fuses/relays. In a typical modern-day vehicle, the fuel pump is a small electric pump, much like one you might use in a flooded basement. If you have a bad fuel rail pressure sensor, the ECU won't send the right amount of fuel to the engine. Fuel pump symptom: You turn the key and the engine cranks for more than 5-secs. This will reduce the frequent malfunction in the car along with stabilizing the car's performance to the maximum. A bad ignition switch causes. I hooked up a code reader and it would not link up. If it whines while cranking, it is most likely a bad fuel pump relay not allowing enough power to operate the fuel pump. Same with various relays which are grounded on. Same with the filter, if it is plugged it can't get enough fuel under that "rush" of fuel. · PTO engaged. This article shows how to replace the fuel temperature sensor or injection pump cover seal on a TDI engine. When the key is turned, the fuel pump is activated and pressurized, which can be heard as a quiet hum in some cars (the proverbial purr). Make sure your prop is properly installed and in good condition. A failing fuel pump will usually throw a check engine light with something like low fuel pressure at fuel rail. Fuel Pump shut off after accident? Jump to Latest Follow 1 - 16 of 16 Posts Do the 06 Caravans have a fuel shut off that activates when the car is in an accident. See what causes these high pressure injectors to fail in this month's issue of Diesel Power. This test will tell you if the computer is pulsing the fuel injectors open when cranking the engine over. How you troubleshoot the problem depends on what type of fuel pump is in your car. Install a spare length of hose on the barb and run the other end into a can on the ground. If the engine cranks over normally when you attempt to start you car, but the engine does not start, the problem may be NO FUEL, NO SPARK or NO COMPRESSION. Remove the fuel injection pump from the block using two screwdrivers to work the pump from the block towards the rear of the engine while keeping the pump as straight as possible. I have a problem with my acadia 2011. The most common causes are in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter). If a lift pump is going bad and failing to supply the proper amount of fuel to the injection pump, then the truck will hard start due to lack of fuel. So you go out one morning and your engine will turn over but it won't start. This may cause the pump to produce the loud humming sound besides stalling along the way. Chevrolet Impala Failed Fuel Pump Can Cause Engine to Stall - 110 reports. Mechanic has turned on or started trailblazer when put fuel through throttle or intake, but also has problems figuring out problem because it will start like how mechanic started it. Once you determine your Fuel Pump is bad These are the processes I went through Link to the thread 12/1995 Explorer V-6 4. But, before you go spending your hard-earned money on a new fuel pump, the pros at Airtex will walk you through a comprehensive troubleshooting process. Hard particulate is commonly referred to as "dirt", but is in fact made up of a wide variety of materials found. Part 2 more detailed causes. This is the electric fuel pump running. Sounds like fuel pump is running even after key is off. Therefore the fuel pump will not send fuel when you try and start the car after sitting for long periods. When I started the engine, I could hear a quite loud whining noise from the fuel pump. • The fuel pump delivers a steady flow of gasoline to the engine and ensures that unused fuel is returned to the tank. The cause of fuel pump inefficiency will typically be a clog or damaged to the pump. Began 1 week prior, wouldn't start, wouldn't start, finally started. Fuel pump problem prompts recall of new Peterbilt, Kenworth trucks with Cummins ISX15. A lack of fuel pressure will cause a vehicle not to start but a no-start does NOT necessarily mean the fuel pump is bad. Pump nor injectors work while in crank mode. If you open the hood and find that everything is covered with gasoline, don't try to start the engine! Gasoline is too flammable to monkey around with. Remove the vacuum line from the regulator, if fuel is present, the regulator has failed. Contributed By: Enginebasics. Just FYI, I had a 1999 Pontiac Grand Prix GTP (same basic engine and transmission I think, GM 3800 Series II engine) that the fuel pump relay went bad on. Fuel pump runs all the time. The fuel pump's job is pretty self-explanatory: to pump fuel from the gas tank to the engine. Common issues include: 1. Turn on the boost pump and it will clear it. Not cranking. Today, the temperatures are in the teens. If a lift pump is going bad and failing to supply the proper amount of fuel to the injection pump, then the truck will hard start due to lack of fuel. But the starter engages and it cranks the engine fine. 0 starts then dies after 2-3 seconds - Ford Explorer Ranger Enthusiasts Serious Explorations. Symptoms of a Bad Electric Fuel Pump Nearly every modern fuel-injected car and truck requires a fuel sending unit. Try: Un-flooding a flooded engine. the pump made no noise and even with my hand on it i could not feel the pump running. Another sign of a bad fuel pump is a misfiring engine which results in lurching car movements. This is usually seen more in the colder months especially if the battery is run down. Used to start when you touched the key and in 1 day it began to crank for a long time prior to starting. cheap enough to replace, but sounds like you have some trash in the carb bowl or a sticky float. I appear to have a bad fuel pump on my 2002 115 HP Mercury outboard, pn 880890T 1. Hey guys, Anyone experiencing start-up problems? Like you hear the starter working but the engine doesn't catch? Well, after a few times last week and after changing the battery my dealership figured (makes sense) a fuel pump issue (replacing under warranty). Engine Will Not Start The PCM uses the trigger signal from the crankshaft position sensor, and/or camshaft position sensor to pulse the injectors. The carburetor is a Rochester quadrajet. When your engine cranks but won't start or run, it could mean your engine is having trouble producing a spark, getting fuel, or creating compression. If there is a problem within this process, the engine will start to jerk or sputter as you accelerate at higher speeds. If the fuel is aerated, then check/repair fuel line and recheck. Water or dirt in fuel system 5. Contributed By: Enginebasics. If there is a leak on the line between the filter and injection pump, the engine will seem to try to start, then become hard to start. First thing you should do check is for a humming noise coming from the fuel pump. Remove the fuel line from the carburetor's inlet and secure it over the catch pan to prevent spilling gasoline onto the ground. If you were to put the gasket between the fuel pump diaphragm and the body of the carburetor, the engine would not run. We replaced the PCM module, ignition control module, fuel filter, PCM diode with no luck. So for those who suspect problems with fuel pumps, check the Spill Control valve. You might want to try testing your car for this before it refuses to start, so you will know whether you can hear it or not. Depending on the particular type of spark plugs your vehicle model is using, you may need to replace spark plugs every 2 or 5 years. Change out pump. Fuel Pump shut off after accident? Jump to Latest Follow 1 - 16 of 16 Posts Do the 06 Caravans have a fuel shut off that activates when the car is in an accident. If you think there's a problem in the electrical circuit and the fuel pump fuse is okay, try switching the fuel pump relay with another similar relay in your car and try starting the engine. Bad fuel pump. If the pump motor calls it quits, there’s no fuel flow and the engine won’t start or run. Fuel lines that are plugged up or. It will have a lot of affect on the life of the engine, especially the cam. Turning key (fuel pump) on and off 2-3 times before cranking seems to help allot. Is there some kind of test to make sure if it is the fuel pump or something else that is bad? Can you temporarily. Turn the key to on position and turn off your radio. Turned out to be a loose ground wire on the fuel pump (or so I was told). If the sensor is not working properly, the pump will not give the engine enough fuel to run, which causes the engine to backfire and randomly shut off. Use new gaskets when necessary. This replaced what was essentially a BB and a ball point pen spring inside the fuel pump which maintained residual fuel pressure while the engine is at rest. If you have a bad fuel pump, it is very possible to start the car, but this should be avoided since the motor and pump will likely become burned out. This fuel pump is accessed under the rear seat through an access panel. The fuel system is critical in storing and delivering the gasoline or diesel fuel your engine needs to run. When this problem first occurs, it will probably take a couple attempts cranking the engine before it starts. So, if you suspect that the fuel pump is bad and behind your 4. The ground and fuel-level sensor return both use a black wire. Below are a number of telltale signs that your car's fuel pump relay is acting up. The fuel delivery system includes the gas tank, fuel pump, fuel filter and the fuel relay. When putting in an aftermarket fuel pump or looking to get more fuel out of your factory pump, one mod worth doing is re-wiring that fuel pump. This test will tell you if the computer is pulsing the fuel injectors open when cranking the engine over. This is a craftsman garden tractor in this particular tractor comes with a twin cylinder Kohler pro 25 horse power engine it’s a carbureted engine. I know it is a fuel problem because I threw a ga. Horrid smog emitted from exhaust on start up. This replaced what was essentially a BB and a ball point pen spring inside the fuel pump which maintained residual fuel pressure while the engine is at rest. You might want to try testing your car for this before it refuses to start, so you will know whether you can hear it or not. Every truly crappy day begins with a car that won't start. The engine has fluid in the cylinder head. Fuel Pump-Check List. Remove the fuel pump from the engine shroud or off of the tractor itself and take the fuel pump apart on a work bench. Finally, any water in the fuel system that freezes will prevent engine starts. 9 round wire on relay won't click off after 5 seconds fuel pump keeps running. Common Symptoms of a Bad Fuel Pump. A wiring diagram is necessary for the various connectors. The fuel pump relay's circuitry opens and sends roughly 12 volts of power to the fuel pump. --But to be certain have the fuel pressure check at the rail. If your car cranks and won't start, you may need to put some fresh fuel in it. This condition creates a rich black smoke from the tail pipe on start up and while running. This article is number one in a six part series on the Cummins fuel system (1994 to 1998 equipped with the P pump). After the engine is running that relay turns off and the current for the fuel pump is supplied via the oil pressure sending unit If that relay fails then the car won't start until the oil pressure is up to three or four PSI. On many automobiles, the fuel pump actuator arm passes through the timing case cover. Average repair cost is $1,180 at 51,700 miles. If you have a bad fuel rail pressure sensor, the ECU won't send the right amount of fuel to the engine. The engine runs good and strong. Fuel pump runs all the time.