fuel problem
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Car: 1982 Trans Am
Engine: LU5 CFI
Transmission: TH-200C
fuel problem
ok i have a 82 crossfire EFI engine, the car runs fine, expect for the fact that it runs rich and everytime i let off gas it lets of an obnoxious pop almost like a backfire, it was cool at first but it just is getting really annoying. i was told by a friend of mine to change out the injectors i just wanted to make sure thats what it is first before i spend a few hundred dollars for the same thing to happen. thanks
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Is the SES light on? If so, get the codes the computer is setting.
I'd look to O2 sensor before injectors.
I'd look to O2 sensor before injectors.
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: fuel problem
I'd also check plug wires, dist cap, rotor, plugs before injectors - ignition issue will cause backfiring. Are any of the plugs wet with gas? All plug wires & plugs firing? How long since cap/rotor/wires plugs been changed? How long since fuel filter change?
What's timing set at?
What's timing set at?
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Car: 1982 Trans Am
Engine: LU5 CFI
Transmission: TH-200C
Re: fuel problem
whats the SES light? i know the check engine light will come on and turn off every so often. it will only last about 10 seconds but i havent timed it. the plugs wire distributor and rotor are all knew i just never gaped the plugs forgot about it but the noise sounds like back firing, also i go through fuel like no tomorrow had a full tank now its at half now and i must have driven less than 10-15 miles maybe more granted i was hammering the gas but i think it to bw a little rediculas
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Car: 1982 Trans Am
Engine: LU5 CFI
Transmission: TH-200C
Re: fuel problem
ok thanks also i pulled the wires plug and distributor appart it all seems fine expect plugs in cylinders 1 and 3 have excess carbon build up and the plugs are literally brand new maybe 20 miles. also cylinder 5 the plug is very clean, thats all i had time to get to tonight was getting too late and too cold. any reason why it might be doing that tho?
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Car: 1982 Trans Am
Engine: LU5 CFI
Transmission: TH-200C
Re: fuel problem
ok iv try that method with the pin and it doesnt seem to work i ran a pin from 6-12 key off, then key on and the service engine stays on like it normally would. i also noticed that it the computer hook up for the car is square not offset, and also there is 12 holes but only seems to be 6 working holes the rest look as if for show or just there
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