backfire through the carb when warm
Thread Starter
Junior Member
Joined: May 2006
Posts: 32
Likes: 0
From: wisconsin
Car: 88 firebird formula
Engine: 305 tpi
Transmission: 700r4 with shift kit
Axle/Gears: 3.73 with eaton locking diff
backfire through the carb when warm
i checked out this trans am yesterday. its got 355 in it. it made about 390+ hp when he first got it. but now he cant get it figured out why it wont run right. it idles when its cold but when it warms up it just backfires and its gotta get shut off.i know its not timing or anything because this guy knows hes doing. does anyone have any idea what the problem is?
Senior Member
Joined: Sep 2007
Posts: 568
Likes: 1
From: Leander,TX
Car: 84 Z28 / 88 Trans Am / 87 base
Engine: L69 H.O. / 468 BBC / 2.8 v6
Transmission: 89 700R4 / TH375B / 700R4
Axle/Gears: 3.73 open / 3.23 posi / 3.42 open
Re: backfire through the carb when warm
either the valves are out of adjustment or the springs just need to be replaced with the correct size. the other possibility is to much ignition advance.
Supreme Member
iTrader: (2)
Joined: Aug 2007
Posts: 2,529
Likes: 1
From: Fairhope, AL
Car: 89RS(other cars & pics in vBgarage)
Engine: LO3, 305 TBI Mildly Modified
Transmission: BakerBuilt 700R4 w/B&M Megashifter
Axle/Gears: 3.23 Auburn Pro Series LSD
Re: backfire through the carb when warm
agree with duckmanquacker.................but also i had a friend that "knew what he was doing" that couldnt get his car to do anything right and i went over and fixed it in 10 mins, he was 180 out on his timing LOL and he "knows it all" LOL 
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tyeo098
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Nov 30, 2015 06:27 PM
