Backfire Problem...Need your help and expertise
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3rd Gear Member
Joined: Apr 2006
Posts: 551
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Backfire Problem...Need your help and expertise
Alright guys, I need your experience and expertise for this one. I have an 88 GT 5.0 completely stock to my knowledge except for some flowmaster mufflers. When my car is cold I am having a problem with backfiring. Can anyone shed any light on the A.I.R. System? Should there be vacuum at the anti-backfire valve all the time or is it ported? The problem goes away once the engine has warmed up. Any help would be much appreciated.
Joined: Aug 2006
Posts: 4
From: South Carolina
RE: Backfire Problem...Need your help and expertise
backfire usually happens during a lean condition, I do not think the a.i.r. system is suppose to run during cold start mode or during wide open throttle, the most common causes are intake leaks, exhaust leaks, or air-flow sensor malfunction
4th Gear Member
Joined: Feb 2006
Posts: 1,375
From: Seattle, WA
RE: Backfire Problem...Need your help and expertise
ORIGINAL: Hawk
Alright guys, I need your experience and expertise for this one. I have an 88 GT 5.0 completely stock to my knowledge except for some flowmaster mufflers. When my car is cold I am having a problem with backfiring. Can anyone shed any light on the A.I.R. System? Should there be vacuum at the anti-backfire valve all the time or is it ported? The problem goes away once the engine has warmed up. Any help would be much appreciated.
Alright guys, I need your experience and expertise for this one. I have an 88 GT 5.0 completely stock to my knowledge except for some flowmaster mufflers. When my car is cold I am having a problem with backfiring. Can anyone shed any light on the A.I.R. System? Should there be vacuum at the anti-backfire valve all the time or is it ported? The problem goes away once the engine has warmed up. Any help would be much appreciated.
Why do you have 2 threads for the same topic?
Pull the codes.
Again, as far as I know (speaking from a decade of experience with these cars), there is NO anti backfire valve.
Can you provide a pic of what you are talking about?
jason
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