Question about 1979 Pontiac Firebird

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1980 Trans am original 4.9 engine. I messed up fuel and air screw

I have a 1980 firebird transam with the original 4,9 engine. I messed up the air-fuel mixture screws.(I thought one of them was the idle screw.

How do I reset the mixture/screws.

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Screw each one in all they way, and then back them out two and a half times, then start it up and then ajust each until it runs smooth.

Posted on May 12, 2009


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I need to know if the transmission from a 1998-2002 pontiac firebird transam will bolt on and work on my 1995 pontiac firebird trans am?

You have to know the motor bell housing bolt pattern

Even if it bolts up, it won't work

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Here are some images that might help to assist you, and let me know if you require any further assistance.

Adjust the curb idle with the engine warmed up and the choke off.


The air/fuel mixture screws should be adjusted with the engine warmed up and at normal idle speed, then turn each air/fuel mixture screw in one at a time until the engine just begins to mis-fire, then back the air/fuel mixture screw out 1-1/2 to 2 turns out a half a turn at a time until the engine idle is the smoothest. (your vehicle might have restrictor caps over the air/fuel mixture screws to limit the amount of adjustment)



The choke adjustments;



To adjust the vacuum tension pull on the choke pull-off:


Adjust the fast idle screw to the proper RPM with the engine cold and the choke on.


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1995 transam firebird

It may not be as simple as opening the radiator cap and dumping in the correct amount and type of coolant. Some engines are terrible about venting the air out of themselves when you try to fill them. On my 95 firebird with a 3.4L, I find it easiest to loosen the thermostat housing and fill it until coolant starts to leak from it. If you do this you will want to know if your gasket or o-ring is good enough to seal when you tighten it back up. Other wise you may need to find a plug in the block or intake or maybe even in both cylinder heads to vent the air out. Trying to run the engine to vent themselves doesn't always work and you could end up toasting your engine.

Good Luck

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C d player error 23 1997 trans am

Check out the forums are filled with peeps and people that work at dealerships that would easily be able to help ya.

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