fuel pump relay problems?

can you do a pressure test? check for dirty MAF sensor and also check TPS. Here is the fuel pump relay location. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Thanks!

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after messing around for a month finaly got my buick running. had to take to mechanic and it wasnt cheap. now 1 week later it dies again figured fuel pump as couldnt hear it power up so replaced it and still nothing. what could cause a loss of power to fuel pump as I have a new fuel pump relay so I can count that out but not sure what else it could be. any help is greatly appreciated as right now I dont have money to take to mechanic but have enuff for parts. thanks a million in advance for the help the relay i replaced was under the hood in the relay center is there by chance a relay center that i am missing as some say there are some behind the glovebox. is this so on my 99 lesabre?

fixed the problem. it was a fuse behind the glovebox that was supposed to be 10 amp but had a 7.5 amp instead. replaced and car fired right up.

good for you. hope it is ok. who put the wrong fuse in??

Roy

not sure who put wrong fuse in. but after driving the car a few miles with no problems all of a sudden it blew the fuse again and as soon as I turn key on after putting another fuse in it blows right away. the fuse I am blowing is for the ecm and maf sensor. this has me confused I know there is a short but not sure where to start looking to fix the problem. any help will be greatly appreciated as I need the car for work

disconnect all 3 loads and see if the fuse holds. if it does, then plug one in at a time and the fuse will blow when you plug in the failed part.

if the fuse still blows with the loads disconnected, then you have a wiring issue.

Roy

i found relays compartments under hood but noting display what these relays goes to how would i tell.

Hello,

Here is the location of the fuel pump relay (below) with a guide to help test it.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Fuel pump stop working, I've sprayed starter fluid and it started right up but soon burned off when ran out. want to check these before I buy a fuel pump.

there is no cut off switch. the relay is under the hood in the relay center. i would look harder at the pump. common failure.

Roy

Engine Performance problem
1997 Buick Lesabre 6 cyl Automatic

I am trying to find out where to locate the fuel relay pump for my 1997 Buick lasabre

Hello, it should be located in the underhood electrical center. Your owners manual, if you have one, should give the the location of fuses and relays.

gas pump was replace but car still cut off. it will run good for 1 week may be 2 weeks. then cut off like it was out of gas. the next day its good to agan. i was told that it was the gas pump relay i dont were it is.

Hello, there is probably a power distribution center under the hood, the relay may be there. I'd check the relay circuits when the problem occurs.

One of my databases showed a fuel pump driver module, the other didn't show that???? I don't know why there would be a module unless it was a two speed pump? I'm just thinking out loud.

My fuel pump runs all the time, just started a couple of days ago. Now tonight it ran the battery down. Could it be the relay or filter? It is a buick lesabre 97

That is an odd problem when key is off power is cut to pump fuse. Try removing pump fuse in instrument panel number 6 fuel pump.
Let me know if is shuts off will have to find out how it is getting power. Any recent repairs?

Engine Mechanical problem
1996 Buick Lesabre 6 cyl Front Wheel Drive Automatic

just replace fuel pump and oil pressure swith and fuel pump relay. fuse was good. now i still don't hear the fuel pump running is there anything else i can check.

you need to do some checks with a test light.

is power getting to the relay

is the ECM grounding the relay when you turn on the key for a few seconds

[quote:d77e4ce015="MJ0704"]Engine Mechanical problem
1996 Buick Lesabre 6 cyl Front Wheel Drive Automatic

just replace fuel pump and oil pressure swith and fuel pump relay. fuse was good. now i still don't hear the fuel pump running is there anything else i can check.[/quote:d77e4ce015]

i can hear the relay when the is key on but no sound fronm the pump

is power coming out of the relay?

I have a 95 lesbare custom and im having issues with it starting consistantly, as well as staying running once it does start. I took it somewhere and the replaced the crank sensor, but that didnt fix the problem. When it stalls, it feels like the fuel is being shut off. I replaced the fuel pump relay, but im still having the same problem. Any thoughts would be greatly appreciated.

Has PCM been checked for codes? check engine light on? has fuel pressure been tested? recent repairs?

The fuel pressure has been tested but I dont always hear the pump turn on when i turn the key. None of the lights are on unless the car stalls. When it stalls the oil, battery, and engine lights come on but when its running theres no lights on. The only thing ive done recently other than what i stated in my question is my front wheel bearings and the water pump and gasket.

Important has PCM been coded? fuel pressure needs to be tested

When i first took it to be looked at they tested the fuel pressure and it passed. im not sure if they coded the PCM

O.K. go to an AutoZone or similar have them check for codes if any post will advise. Was IAC looked at when at shop? Why was crank sensor replaced?

i have a 1994 buick lasabre that i thought had a bad fuel pump but now i believe it may be the relay i have found the location of the relays for the car but there are six relays in that location 5 gray and 1 black and there are no marking to tell which is the relay for the fuel pump how can i find the right one ?
to replace

thank you

Hi stretch1967,

It should be at the passenger compartment relay centre, behind right side of dash.

Here is a guide to help you test the relay once you find it from the diagrams below.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers,

Will an AutoZone be able to read obd1? they said the crank sensor was pertty worn and could have been the problem. Im not sure what IAC stands for so i cant really answer that lol.

thank you for answering this question the relays i was looking at were on the fire wall under the hood i would not have found the relay center inside if it wern't for your answer thank you again

I dont know if they checked the IAC. they did try replacing the mass air flow sensor but that did nothing as well.

IAC idle air controler if faulty can cause hard start and stalling
Car is equiped with ODB11 has 16 pin connector GM sswitched over in 95

Would it also cause it to die out while driving? Its shut down on me several times on the highway as well as stalling from idle.

IAC would not cause shut down at speed Need PCM checked for codes may have faulty PCM shuting down fuel pump

1993 Buick Lesabre 6 cyl Front Wheel Drive 136833 miles

I need to find out which one of the relays is the fuel pump relay.

The relays are located in the maxifuse / relay center which is located on the passenger side of the engine compartment, mounted against the fire wall. There are two fuse boxes, and a row underneath of relays.

Which one of those relays is the fuel pump relay?

Hello, my info just says position H for the fuel pump relay, like, abcdefg-. If you can see the wiring colors for the connector, you can double-check, gray-- black with white tracer--red-- dark green with white tracer-- pink with black tracer.

There also should be a fuel pump prime connector behind/around the battery, red wire with connector, nothing plugged into it. If you use a jumper wire and run B+ to the connector, the pump should run, use an inline fuse. That way you can run the pump without using the key, just for testing.

okay ill have to get it checked. im hoping the pcm is fine ive had to change that within the last couple years as well but this issue is recent. Will post with results for further thoughts if needed.

how to bypass the fuel pump relay switch on a 1992 Buick LeSabre