Question about 1990 Pontiac Firebird

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How do u trouble shoot fuel pump in 1990 Pontiac firebird

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  • Diane Isley
    Diane Isley Dec 02, 2012

    The firebird bird starts, backfires, and cuts off like starving for gas. How do you check to see if it is the fuel pump or trouble shoot the problem.



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Posted on Jan 02, 2017

  • 104 Answers


Many of the Pontiacs of that era up to even present models had an access panel in the trunk that you could access through the back seat pass through.

Its been a while since I seen the inside of a Firebird, but in thinking about it the back seat pass through may not be present on the Firebird, but it may be worth the time to lift up the carpeting in the trunk area and see if there is an access panel to the fuel pump.

Posted on Dec 30, 2008

  • 2 Answers

SOURCE: 2000 pontiac firebird

A good way to tell if its the fuel pump, is to have someone listen underneath the car when you turn the key, you should hear the pump start to prime before you attempt to start the car. I had a similar problem with this on my 2000 Trans Am-it ended up being my ignition relay-open your underhood fuses an look for the relay labeled IGN an switch it out with another relay in the fuse panel, many of them are similar so it shouldn't matter-i used a fan relay myself-try to start the car an see if that helps-they are fairly cheap mine was only about $15 i believe hope this helps

Posted on Feb 24, 2009

  • 202 Answers

SOURCE: 87 firebird fuel pump

Remove the exhaust, drop the rear end, remove the fuel cap, and surrounding rubber flange. remove the two hanger straps (be sure to have fuel tank supported so it doesn't just fall out. Remove hoses/electrical connector. Pull tank out, and remove metal lock ring that holds fuel pump assembly in place. Remove fuel pump assembly. Installation is reverse of removal. I have had 7 of these cars, and am currently driving one now. If you have any other questions about it, please ask!

Posted on Mar 27, 2009

  • 28 Answers

SOURCE: i have a 89 pontiac firebird formula that is not

see if your car has a fuel filter and check its not blocked, or see if your fuel lines from the tank to the motor and dented or blocked

Posted on Sep 02, 2009

  • 395 Answers

SOURCE: 1993 pontiac bonneville fuel pump problem

It could be that you have picked up a batch of dirty fuel that has clogged the gauze input filter that is part ot the fuel pump inside the fuel tank.

Posted on Jul 30, 2010

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I have a 1990 pontiac trans am gta, my fuel pump is working replaced fuel relay but fuel is not getting to the injectors, what can i do???

check fuel regulator. chek fuel pressure w/gauge see if have rite pressure if does put vacuum on regulatoer w/vacuum pump if pressure drops replace regulator

Oct 20, 2010 | 1989 Pontiac Firebird

1 Answer

So you guys got me on the right path she will fire up and run smooth but now tons of gas is spraying on manifold. Replaced Fuel pump and MAF sensor any suggestions on where to begin trouble shooting.

Fuel rail connections are very sensitive. Check to see if they are under any external pressure and that something isn't pulling on the rail. Also check all injector o-rings and proper insertion into the rails.

Sep 20, 2010 | 1988 Pontiac Firebird

2 Answers

Replacing the fuel pump on a 1990 Pontiac Firebird. How?????

i cut a square about 18 inches by 18 inches in trunk my fuel pump is right there no need to drop tank .replaced with board or fiberglass with some silicone to hold and put carpet back ..wala....rick..

Aug 11, 2010 | 1990 Pontiac Firebird

1 Answer


My 92 Bird with the 3.1 did the same thing after it sat for about 2 months. The car had aways started right away before. I had to jump start it and I thought it would never start.Same as yours after it started. Seem to get better after I ran it awhile. It was getting good spark and was getting fuel. I checked fuel pressure, it seemed to be within specs.then it started to sputter and the pressure dropped to almost nothing. Seems that the fuel pump was going bad, but still would pump enough fuel at times to run. When the car was parked the fuel pressure would bleed off, and when I tried to start it the pump had trouble pumping enough fuel to pressure the system.Long story short! Replace the fuel pump, and filter.....

Mar 29, 2009 | 1990 Pontiac Firebird

1 Answer

1992 firebird v-6 auto fuel problem

There is a fuse that is pig tailed from the positive lead to the battery. Check it. Also you can check to see if you have power to the fuel pump. Take your old pump, and put 12 volts to it, and see if turns on. If it does, then the pump was never the problem.

Oct 10, 2008 | 1992 Pontiac Firebird

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