Question about 2001 Saturn S-Series

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Car will not start

Change fuel pump and relay. the pump starts for at least a second when you turn the key for the first time. if you turn the key again the pump will not start and will not build pressure. if you wait several minutes and take the key of the ignition it will sart again for a second or two and you will have to start all over again because it still has no pressure. the car starts with starting fluid

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  • russell_2626 May 13, 2009

    I have a 2001 saturn that after driving and turn it off it will not start, it wil not crank and I have power to everything after it sits for awhile then it will start like nothing it wrong

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  • 474 Answers

You might have a bad key.The security system uses the key chip to keep the fuel pump running.

Posted on Sep 07, 2008

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1 Answer

I have a 93 Ford F150 4.9 liter. And when I go to start it the fuel pump stays running for close to four minutes and then it will not start until the fuel pump shuts off?


OK, when you turn the key to on, it will start the pump for about 2 seconds-this is just to put pressure in the lines and in the fuel rail for easy starting. If key is not turned to start, pump will shut off after 2 seconds. But when cranking in start, and when engine is running, the pump is on full time.
If your pump runs longer than 2 seconds with key only in on position, you have a fuel circuit problem. It very well could be a bad fuel pump relay staying on. Or it could be a computer problem signaling the relay to stay on longer. Try a new fuel pump relay first and see if that was the problem.

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I have a 2004 Daytona 600. It's been sitting for several years. I changed the battery, oil, gas, and spark plugs but it still won't start. Engine turns but don't know of it's not getting gas or fuel.


You should hear the pump in the gas tank turn on for 2 seconds when you turn the key to on, not start. A buzz or hum from the tank area? If yes, the pump is supposed to put enough pressure in the line to the engine and the injectors for the car to start. Maybe not enough pressure if it won't start. Change the fuel filter and try again. If no help, maybe a weak, tired pump. You will need the fuel pressure checked to compare to specs for your model . Autozone and others rent or loan fuel pressure testers.

If no noise from the pump, check the fuel pump fuse, under the hood in the power distribution center or fuse/relay box. In that same place is the fuel pump relay. Locate the pump relay from a diagram on the fuse/relay cover. Hold your finger lightly on this pump relay while someone cycles the ignition key from off to on. If the pump circuit is working right, you should feel the relay click. That should send power to the fuel pump to turn it on for that 2 second period. If you feel it click and the fuse is good, possibly the pump or the pump's ground wire is faulty. If you don't feel the relay click with key turned to on, the fuel pump circuit will have to be diagnosed. Good luck with your project. Let me know how you progress.

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Why does fuel pump cycle twice and then have to reset computer?


This is common, the pump will run for 3 seconds when key is turned to the "on" position to prime the fuel system, then it will be turned on by the ECU when the engine is started by a signal from the crank sensor.

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1 Answer

Pcm


Did you check the fuel pump relay ? The relay gets power from a fuse and also from the PCM relay. The computer grounds the relay to turn it on for 3 seconds when you turn the key on, then only after the computer "sees" RPM or oil pressure.

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1998 chevy astro van sometimes works, sometimes not.? At timesm rarely, the astro will crank but will not start. Fuel pump not cycling and making its hum noise so I changed the fuel pump with an AC Delco...


When you first turn on the key, no crank, the fuel pump should run for a few seconds then stop. There shows to be an oil pressure switch in parallel with the fuel pump relay. It's just a redundant power supply to the fuel pump. Once it cranks enough to bring up oil pressure and the switch closes, the pump will run even w/o the relay. Both the fuel pump relay and oil pressure switch get voltage from the ecm b fuse.
At the fuel pump connector, check voltage and ground, when problem is ongoing. Gray wire is voltage--black wire is ground.
You could pull the fuel pump relay, use jumper wire between terminals on load side of relay. The load side is that line with arrow head, when energized that line moves to the other terminal. As you can see, the orange wire is hot all the time, the gray wire carries voltage to fuel pump. If it runs with jumper, then check control side of relay, the control side has to have voltage and ground, dark green wire with white tracer is voltage comes from pcm. The black wire is ground.
astro fuel pump-qgwxdgfz1nju2hdotm0lfflo-4-0.jpg

Mar 13, 2017 | Chevrolet Astro Cars & Trucks

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2000 mercury grand marquis 4.6 Intermittent problem. 35,000. miles. Problem engine died several times wile driving. Also after car is parked from a drive will not start. Found that the fuel pump is not...


I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
mercury fuel pump-i4kx0gxqalhdz4ok10irisui-5-0.jpg

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1 Answer

I changed my fuel pump and filter now it dosnt start the first time only the second


I would check to see if you are losing pressure. You should have constant pressure in the system at all times. A quick thing you may want to try is when you first go to start it don't. Just turn the key to the on position without turning the engine over for about 5 seconds. Then turn the key off. Turn the key back to just the on position again. Turn the key off. then try and start it. Turning the key to just the on position will engage your fuel pump relay for about 5 seconds which in turn will build up fuel pressure. If it starts after you do this the first time you may be losing pressure. You can always put a pressure tester on there and check the prssure while it's not running to see if you lose prssure that way. It should have pressure even when it's not running at all times. I hope this helps and good luck.

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2 Answers

Cranks but wont start ,sputters but wont start has fuel in tank, it is a 1999 cougar V-6


Hi!!It sounds like your fuel pump is not working. Check fuel pump relay on engine compartment fuse box have somebody to turn the ignition key to the RUN position, DO NOT CRANK ENGINE (feel if the relay clicks when the key is turned, it will only be energized for a couple of seconds and then you should feel when it gets de-energized. if relay is OK, remove the fuel tank gas cap and repeat the same key operation, listen to the fuel pump coming in, again this will be running only for a couple of seconds, try a few times until you are sure one way or the other. If fuel pump works, then replace fuel filter and try to start vehicle. If vehicle does not start. You need to check fuel pump pressure. borrow a tester form Autozone or similar auto parts store. The fuel pressure should be between 30-40 psi with key ON engine OFF. If pressure is off either way, replace fuel pump. Here is how to hook up the fuel pressure tester 1kbron_71.jpg
Good Luck! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

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I need to know how to check the fuel pump relay. If it is good, my fuel pump is bad. Can I by-pass the internal gas tank fuel pump and put an external one on. This is for a 2001 chevy blazer. Is it...


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