Question about 1984 Ford Crown Victoria

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Fuel pump continousley runs even when the car is turned off

I was checking the fuel pump relay by checking it with a piece of wire where the relay goes and i believe i put the wire in the wrong place and thefuel pump came on but the car would not start so i put the wire in the right slots the fuel pump came on and the car started but the fuel pump stays on and the carburator is gettting to much gas because the fuel pup is always running so i brought a new relay but the pump still runs when the car is turned off is there anyway i can reset the fuel pump or do i have to replace the fuel pump thanks MR. C

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Try disconecting the power from the vehicle all together this should reset it. some vehicles actually have a fule bump switch on them (normally in the trunk)

Posted on Jun 20, 2009

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Posted on Jan 02, 2017

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Fuel pump won't cycle when the key is turned on 93 Chevy astronaut 4.3 eng


For initial prime, you have to check fuel pump relay and wiring circuits. The control/coil side of relay gets voltage from pcm, green wire with white tracer. The ground for control side of relay, should be a chassis ground. Voltage for load side of relay is fuse protected.
This vehicle has an oil pressure switch in fuel pump circuit, just a redundant power supply to the fuel pump. Even w/o the relay the vehicle should start and run, once the oil pressure builds up and that switch closes, the fuel pump will get voltage. There won't be any initial prime w/o the relay.
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Nov 10, 2016 | 1993 Chevrolet Astro

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No fuel. pulled off fuel line to carb and cranked engine no fuel coming out. Relay under dash working. No sound at fuel tank when key is turned on. Are there any other fuses or relay for fuel system?


Check for power output at the relay, there should be a pink wire with a black stripe that connects to the fuel pump relay, when the key is turned on it should have 12 volts for a few seconds, then drop to 0 volts. This is the prime function that builds fuel pressure before you start the engine. Even though it clicks it doesn't mean it works - the contacts could be bad. This wire continues straight back to the pump, if it has power there may be a damaged wire between the relay and the pump or a bad pump - the pump is fairly common on these vehicles.

These pumps last longer if you don't run less than 1/4 tank of fuel - keeps them cooler.

Sep 29, 2015 | 1994 Geo Tracker

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Just brought 2000 chevrolet venture van have fuel pump isseu but not pump i checked fuse box someone have a small black wire connected to fuel pump fuse and fuel pump relay that blow so i replace both...


It's possible someone used the jumper wire to load side of fuel pump relay, gray wire. That supplies voltage to fuel pump motor, the fuel pump fuse is hot all the time. The fuel pump will run all the time even with key off, running down the battery. They used the jumper because of some kind of problem. Can you unplug the relay and check relay terminals, where the relay plugs in. Use a test light, either a problem on the load or control side of relay. Are the relay terminals numbered, like 30 and 87, maybe 85 and 86 also?
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93 chevy caprice 5.0 new fuel pump changed relay and fuse still can't get pump to work can't even get relay to click checked power to relay and used jump wire to pump prime wire pump works w


If relay worked when placed in another vehicle you must have a wiring problem. trace wires from fuse block to relay checking for corrosion or short.

Jan 12, 2013 | Chevrolet Caprice Cars & Trucks

1 Answer

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.
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Mar 13, 2017 | Chevrolet Astro Cars & Trucks

1 Answer

My fuel pump keeps running fuel rail up to pressure even after the car has been stopped. i cant find any leaks and thought the pump should stop after turning off ignition. any ideas


The fuel pump relay has to be checked.Usually, when this relay fails it gets stuck in the on position, allowing the fuel pump to continue running even though the car is turned off.Fuel pump relay is under dash above E-brake. Fuel pump relay has 2 White with black stripe wires thar are 12 volt with ignition on.

Nov 08, 2010 | 2002 Nissan Pathfinder

2 Answers

1991 chevy cavalier- stopped running going down road. Replaced fuel pump and fuel pump relay-ran for two weeks and the when making a stop,cut off again and won't start and is blowing the fuel pump fuse...


Sounds like a short between the fuse panel and the fuel pump relay. This can be from the fuel pump relay itself through an exposed bit of wire, or even a defective relay which seems to happen more than most times. Check the wiring to the relay and wrap or tape anything where bare wire may be exposed. Disconnect relay and try a new fuse. IF the fuse doesn't blow, then the problem source is the relay itself that is defective.

Hope this helps!
Chip

May 31, 2010 | 1991 Chevrolet Cavalier

1 Answer

No power with fuel pump bought car the last owner serviced it then stoped useing it changed starter motor and fuel pump and filter drained tank and put fresh fuel in it has got spark and does turn over but...


firtt make sure the pump is not clogged up , then if u remove the relay and put a piece of wire across 2 off the terminals to make it run constant to see if pump ump is working , or u could wire the pump up to test

Aug 13, 2009 | 1984 Porsche 928

1 Answer

The vehical won't start, even when turned over!


Before you change the fuel pump check the fuel pump relay. it is located under the power box. The power box is just behind the battery, under the hood. The box is attached to the fire wall. After removing the power box another plastic piece holds all of your relays. I would check this first. I had the same problem and it turned out to be the relay. I found out after I changed the pump.

Mar 03, 2009 | 1989 Ford Bronco II

1 Answer

No Power to Fuel pump


I would check the ground for the fuel pump relay that operates the switch side of the relay.
You should have 2 12v inputs to the relay. When the relay gets 12v input, it closes the relay switch on the heavy current side that sends 12v to the fuel pump.

A relay is needed because you don't want heavy current going through the switch.

Also, most cars only run the fuel pump for 2 seconds when the key is turned on because you don't want the fuel pump running without the car running. If you listen closely at the fuel tank, you should hear the pump run for 2 seconds when you turn the key to "ON"
When the key is turned to "START", the fuel pump should run continuously.
The engine computer tells the fuel pump to shut off if the engine rpms are zero.
So, I would check the switch side of the relay. Power amd ground.

Mar 01, 2009 | 1992 Jaguar XJ6

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