Question about 1994 Buick Regal Gran Sport

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Sometimes when turning key instruments work but won't crank eng

Sometimes when turning ignition key instruments work and fuel pump in tank works but won't crank engine.I know the battery is good and the starter is good. Only happens occassionally

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Check the grounds, all of them should be clean and tight. Don't forget the ground to the body!
check the cable to the starter, if swollen anywhere, replace

Posted on Feb 10, 2009

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Will not start will crank will start with starting fluid but when quit spraying eng quits


`Probably the fuel pump in the tank has stopped working. Verify with a check for power at the gas tank connector: When the engine is cranking, the fuel pump wire should have power on it-use a test light or voltmeter. If the wire has power, but pump will not turn on, the gas tank will have to be removed to replace the pump.
Just by turning the key to on, not start, will or should cause the fuel pump to come on for about 2 seconds to pressurize the fuel lines and put gas under pressure against the fuel injectors. If you don't hear the pump buzz on for a brief time, you know you need to check the fuel pump circuit. Check fuse, check fuel pump relay...but the easiest way to verify a bad pump is to check fuel pressure, or check for power at the gas tank when the engine is cranking. No power is a fault in the circuit (fuse, relay, wiring), power available to the pump but no pump means the pump will have to be replaced .

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Start with the fuel pump.When you get into your car turn the ignition key to the on position but do not start your car.Listen for the fuel
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Do you mean it cranks but won't start?
Check for spark at a spark plug wire. If you have spark, it's probably not the ignition, but a fuel issue. Do you hear the pump come on briefly when key is turned to on? You may need to stand by the gas tank with the cap off, while someone turns the key on. The pump should hum or whirr for about 2 seconds to prime the fuel system. Then it will shut off until car is cranked over. If the pump and the ignition is working, check fuel pressure.
If you had no spark, it could be the coil, or crank position sensor, or...well, you would have to diagnose the ignition system.
If the problem is not cranking over, check all connections at starter and battery for a clean tight connection. Check for power at the starter solenoid when key is held in crank position. If power there, the solenoid must be bad. If no power the circuit from ignition switch to the starter solenoid has a problem ( like the starter relay or the neutral safety switch).
Good luck.

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You might have a defective fuel tank pressure sensor!

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How do you test the fuel pump relay on a 1991 Toyota Celica 1.6 Car just died and won't crank. We changed the ignition coil and still won't crank. Fuel pump is working. Toyota place does not check...


If the car will not crank then you have a battery, cable or starter issue. If the car will crank but not start then the problem may be the fuel pump relay. There should be an electrical diagram on the side of the relay. Apply 12v to either side of the coil and you should here a click. Then check for continuity between the other two terminals with voltage applied. If you have no continuity then the relay is bad.

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fuel problem or spark problem neither is associated with a change in sparkplug unless you had a sever misfire that you let go for a long time to cause thhe igition module to fail.and this include the crank sensor that is underneath the ignition module. cycle the key you should hear a humm at the fuel tank and that is the fuel pump working if you hear the fuel pump then more than likely you will need to correct for spark ignition module and crank sensor

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Car will turn over but not fire up sometimes will get it to start not sure if its the fuel pump


It can either be the fuel pump or the ignition module. Have someone listen by the fuel tank or take the gas cap off and use a screwdriver to open the metal door under the cap, as you turn the ke foreward, not far enough to crank the engine over but so all the dash lights come on. You should hear the fuel pump turn on for a few seconds. Fuel pumps work then not work then work right before the go out for good.

Ignition modules start to work only while the engine is cold, then eventually the won't work at all.

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Just replaced the fuel filter on a 2003 Silverado and it still won't start. How do you determine if the fuel pump is bad?


Have someone lay under the truck next to the gas tank and listen while you turn the key to the ignition on position without cranking it. The pump should hum for two seconds when you first turn on the ignition.
You could try banging on the tank with a baseball bat, sometimes this wakes up the pump and it starts. If this works, replace the pump because it's not fixed.

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