1988 Pontiac Firebird 88 Pontiac Firebird Trans Am

Tiny
DCOLLINS7
  • MEMBER
  • 1988 PONTIAC FIREBIRD
  • V8
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
I have 88 firebird trans am 5.0 305 fuel injection. The fuel pump was recently replaced from previous owner and fuel lines were cleaned. Can will start up great but idle rough and when I give it gas it will immeadiatly die out. If I allow the run to run with out giving car gas it wiill continue to run but idle rough. Not sure where to start here. It appears the fuel pump is working properly.
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Tuesday, April 6th, 2010 AT 6:02 PM

3 Replies

Tiny
HMAC300
  • EXPERT
Check your fuel pressure, it should be 40 p.S.I. Try changing the fuel filter first and then see what happens. The fuel pump mya have been changed but it may not be on right and not getting the correct pressure. There is a tap righ ton the fuel rail to check the pressure.
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Tuesday, April 6th, 2010 AT 7:04 PM
Tiny
DCOLLINS7
  • MEMBER
I am trying to change the fuel filter the book is confusion it says to access droping the tank then it says to remove fuel pump from trunk. I am not too expience with cars. Do I need to drop the tank to get to the fuel pump an fuel filter or is there a more simple way. I have the fuel pump loose but cant seem to remove it from teh trunk. Also is there a good website or manuel you can recamend which for less expience people. Car is 88 pontiace Firebird 5.0 throttle body 305.
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Thursday, April 8th, 2010 AT 8:32 PM
Tiny
HMAC300
  • EXPERT
You have to drop the tank to get the fuel pump out. The fuel filter should be along the line on the side of the car, just follow the fuel line and you will see it it's a cannister about 2-3" long. As far as a manual goes, go to the site here and look under the site menu I think under auto maintenance, you can get a 3 day manual for your car for $10. Then you can look up what you need and download the area you want to work on and print it if it will allow you to do that. That should work out for you, otherwise you can always go to the auto parts store and get amanual there but they are about $35 or so. Also when you replace the pump make sure you don't damage the harness from outside the tank to the pump. Those are small wires and damage easly. ALso make sure that when you install the pump that it is on there good as they fall off sometimes and I kind o fthink that is what's wrong with yours or something similar. Of course follow all safety stuff and do not smoke anywhere near a gas tank that is opened up as the vapors are more dangerous than liquid gas.
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Friday, April 9th, 2010 AT 8:38 AM

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