fuel pump wont stop!

[Rally Sport]

Originally Posted by wrightz28

this is the part where I'd start thinking about buying an external pump.

Those are only for older cars that had manual fuel pumps. Damn you with your carbed cars, DAMN YOU! Or if there are some external ones, then damn you as well.

[AFI 05]

Originally Posted by kahjdh

That car hates you

lmao man this sucks. i have this weekend to work stuff out so ill see what i can do.

[AFI 05]

Originally Posted by instantkevin

i highly doubt the bad relay... if that was bad it wouldn't turn on. uness for some odd reason it's not sending the right amount of voltage... but this is probably not likely. just like CamarosRsweet said, the pump continues to run until it has built up sufficient pressure, the fact that it is taking longer means there is a pressure leak somewhere or the pump is defective. lack of pressure is why your car takes longer to start.

is gas cap installed correctly and holding pressure?
leaking fuel anywhere?
reset computer.
exchange fuel pump (I know... it sucks)

hmm.. well.. it isnt that it takes longer.. it just doenst stop at all. even when i turn the key to turn on the stereo or whatever, you hear it going the whole time. THEN, it sounds like it doesnt want to turn on but i step on the gas and it turns on.. odd cause stepping on the gas just lets in air. and when i turn on the car and i need to give it 'gas', the check engine light stays on. ill see what the code is whenever i have time.. we'll see what it is

[corning_d3]

You know, at first glance i thought it may be a relay. But after reading up on your vehicle, i noticed something. When you turn your ignition to run, the PCM commands the pump to operate for 2 seconds, no matter what the fuel system pressure is. So it seems to me that the PCM won't stop sending voltage to the fuel pump relay, which would indicate a bad PCM. There is a fuel pump test wire located beside the relay(one red wire w/ a black connector). Make sure it's not hooked up to anything.

[wrightz28]

Originally Posted by Rally Sport 92

Those are only for older cars that had manual fuel pumps. Damn you with your carbed cars, DAMN YOU! Or if there are some external ones, then damn you as well.

Yes there is external electric pumps, and I will have one whenever I have to drop my tank.

[AFI 05]

yeah a few people have told me its probaly my ecm thats fucked up. Is there any way to check that? If its badm I need to replace the whole thing and get a new PROM or just the unit itself? If I need to replace both, I might as well get a customed burned PROM since I'm gonna start to modify it.

[89IROC&RS]

sounds like a bad pressure regulator, not a bad pump. with fuel injected cars there are two fuel lines, a supply and return. the fuel pump sends fuel up the supply line and into the fuel rails, then the fuel hits the pressure regulator that allows the pressure to build, but because the fuel pump only runs at one speed, and does not alter in relation to pressure the gas has to get out somehow, thats where the pressure regulator comes in, if the pressure gets too high it allows fuel to release out of the fuel rails and down the return line to the gas tank. it sounds to me like your pressure regulator is stuck open or something. its going to be located on a fuel line between the two fuel rails just in front of the distributor, im thinkin youre gonna have to remove the upper plenium to swap it out.

[AFI 05]

Ahh look whos back.. wow i learned something today thanks 89. uhh would this work? So because of the other problems I was having, I think its either my sensors TPS, IAC (which i havent installed) or my ECM.. do the sensors get screwed up if the car is garaged and not used for like 2 years? well thats what happened before I got the car so I dont know if the sensors are bad cause of that or other reasons.

[AFI 05]

ahhh so could my bad fuel pressure regulator be the cause that my car revvs on its own when stopped or something. it just lunges forward by itself when at a stoplight after idleing for a while.

[supervisor1886]

You got yourself a lemon, and you will have to replace everyting thats typical to these cars. First its not likely that its the pump (unless you screwed up the pulsator) connect the gage by the way. Usualy a warm start would be a problem. Yours lies in the Coolant temp sensor or cold start injector. If it was overheating before i would assume that. maybe leaking injectors (not likely thoug) They dont really set codes all the time either. If you had a bad pump your acceleration would suffer.

I suggest that when doing a pump you can convert it into a 2 piece system from an old BMW cars.1 bosh pump goes inside (they last a long longer) and another one goes outside (its huge and delivers gigantic amounts of gas) plus you wire it to a relay and activate manualy (can be used as an antitheft device), also i would get a pressure regulator because those pumps develop 70psi. And you can always prime the system yourself in case if it run out of gas or whatever. Also consider getting a 4 gallon fuel cell and a jerry can.

[89IROC&RS]

the aftermarket adjustable regulator would work, although normally id stick with a factory replacement when i was diagnosing something. the lunge, does it only happen in gear? or even in neutral? if it happens in neutral, its definatly engine related, if its in gear it could be a tranny problem.

parking a car for 2 years shouldnt hurt the sensors, what it might do is allow the gasoline to varnish and cause problems. did you flush all the old gas out before starting it?? and run a can of injector cleaner through it???? if not, id say you have some gasoline deposits like varnish and resin causing you problems.

[AFI 05]

Originally Posted by supervisor1886

You got yourself a lemon, and you will have to replace everyting thats typical to these cars. First its not likely that its the pump (unless you screwed up the pulsator) connect the gage by the way. Usualy a warm start would be a problem. Yours lies in the Coolant temp sensor or cold start injector. If it was overheating before i would assume that. maybe leaking injectors (not likely thoug) They dont really set codes all the time either. If you had a bad pump your acceleration would suffer.

I suggest that when doing a pump you can convert it into a 2 piece system from an old BMW cars.1 bosh pump goes inside (they last a long longer) and another one goes outside (its huge and delivers gigantic amounts of gas) plus you wire it to a relay and activate manualy (can be used as an antitheft device), also i would get a pressure regulator because those pumps develop 70psi. And you can always prime the system yourself in case if it run out of gas or whatever. Also consider getting a 4 gallon fuel cell and a jerry can.

I have a brand new coolant temp. sensor, new fuel injectors and my car doesnt have a cold start injector. i dont know about the BMW pump oh yeah, i have a brand new pump as well.

[AFI 05]

Originally Posted by 89IROC&RS

the aftermarket adjustable regulator would work, although normally id stick with a factory replacement when i was diagnosing something. the lunge, does it only happen in gear? or even in neutral? if it happens in neutral, its definatly engine related, if its in gear it could be a tranny problem.

parking a car for 2 years shouldnt hurt the sensors, what it might do is allow the gasoline to varnish and cause problems. did you flush all the old gas out before starting it?? and run a can of injector cleaner through it???? if not, id say you have some gasoline deposits like varnish and resin causing you problems.

cool. alright, sometimes, when it reaches operating temparature, and im stopped for long periods of time (like trying to get out of a crowded parking lot and waiting and waiting while in [D]) it just gives itself gas, it just goes vroom by itself and moves a few inches or like half a foot forward, good thing im holding the brake down during this. it has done this to me three times, all on different days and it doesnt do it all the time but thats why when im stopped, i just put it in N. Its really odd i know and i have no clue whats causing it. When I got the car, i didnt drain the old gas, it didnt have much, like almost empty and we put in gas on the drive home. I also did put some of that Techron fuel system cleaner from Chevron that same day.

[supervisor1886]

Bad injector? mAybe or too much pressure. Doest it look like its choked and runs real rich. Also I experienced it myself on a carbed car and after a couple used carbs I concluded it was a bad stall converter. Not sure tough.

[supervisor1886]

Bad IAC may do it too