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How do you test a fuel pump on a 1990 Ford Festiva?
pull fuel pump out ,access cover under rear seat. run hot and groung wires directly to pump from battery.
What will a bad fuel pump relay do to your car?
Bad fuel pump relays aren't very common but i do run across them every now and then. If the relay is bad one of 2 things will happen - if the relay is "open" (unable to complete the circuit)then the fuel pump will not run and the car will fail to start. If the fuel pump is shorted (the contacts in the relay are fused together)then the fuel pump will never shut off...even if you shut the car off and the key is in your hand the fuel pump will continue to run until the battery is drained of voltage. Then the car will not start without charging the battery or "jumping" the car. About the worst thing a bad fuel pump can do to your car is cause it not to start. It could possibly ruin your battery if the battery sits discharged too long. However the odds on that are not great. Just charge the battery - change out the bad fuel pump relay and everything should be OK.
Truck will no start its a 1996 ford powerstroke i have changed the fuel filter and the camshaft position sensor and put new baterys in it and a new starter it acts like it want to run but dies?
Try replacing the fuel pump.
Key on fuel pump test runs intermittently?
Note that when you turn on an ignition key, the fuel pump SHOULD only run for a few seconds if the engine doesn't start. The purpose of that is to prevent unnecessary operation of the fuel pump and to avoid draining the battery.
How to tell is its fuel filter or fuel pump?
If you turn on the ignition without starting the engine you should hear the fuel pump run for a few seconds. This is a good indication the fuel pump is good but not 100% positive. A bad fuel pump can run but not pump fuel. If you hear it for run for a few seconds just replace the fuel filter to make sure it is not clogged. If it still does not pump have a fuel pressure test run to verify the condition of the pump.
Where is the fuel shut off switch on a 1999 Chevy Express van?
Not positive but some models of Chevy a bad oil pressure switch will cause the fuel pump to run all the time and run down the battery and also cause a safety hazard if you are in a accident and the fuel line is broken it would pump until the tank is dry or battery goes dead.
What could be the problem in a 2000 Cougar that has 12 volts going to a new replaced fuel pump but the pump won't run?
The computer may not be enabling the fuel pump. If the fuel pump works when connected directly to the battery, it is good. If it won't work when connected to the wiring harness, then the computer might need to be reset. This involves disconnecting the battery for a little while, say, half an hour.
Why does fuel pump run but not pump fuel?
Could be,out of gas, pick-up sock in tank plugged, pump motor may run but the pump itself is bad,
Where is the fuel pump relay switch on a 1995 Dodge Spirit and how do you replace it?
There is no fuel pump relay, it is controlled my the CPU. Unfortunatly it is on the same circuit as the coil so if you have spark but no fuel it is the actual fuel pump. Now if you do not have spark or fuel, it is the computer. You can go to pick and pull and get another one, but if you are in a pinch you can run a jumper to the coil from the battery and it will energize both the coil and the fuel pump. This will get you back on the road temporarily or forever if you install a switch and run it to the battery. Note: this also makes a handy kill switch. I used to run these cars as taxicabs and we literally kept em going with duct tape and baling wire.. you
Bought a gm tbi motor it has a blank plate where the fuel pump is does the cam have a lobe for a mechanical fuel pump?
Yes it does. But you can not run a mechanical pump on a fuel injected engine. It will not pump enough fuel to run the engine.
Have fuel to pump but not coming out of pump to injecters?
The fuel pump may be defective or the fuel filter may be clogged. Replace the fuel filter if you hear the pump run when you first turn on the ignition without starting the engine. It should run for a few seconds. If you do not hear the pump running, check the fuse and the fuel pump relay. If you hear it run and after replacing the fuel filter you still have no fuel, the pump is defective and must be replaced.
Could a car still fire up and run with a bad fuel pump?
No, but it could run with a weak fuel pump.
