2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Loud Poppin Noise At 7k Or Higher

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Old 09-02-04, 02:06 PM
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they r slightly black but not real bad lookin
they rnt wet nor coated in oil
Old 09-02-04, 02:09 PM
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Actually I would guess it's afterburn, not backfiring. But, who knows. If it's afterburn it's caused by running rich and the exhaust heating up igniting the left over gas. Almost like detonation, but in the exhaust.

I think that's ^^^ right.
Old 09-02-04, 02:12 PM
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Pretty much, it's probably just the excess gas/oil burning up in the exhaust on the backfire, nothing to worry about. Now if you have smoke at any other time, then it's time to get worried.
Old 09-02-04, 02:19 PM
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nope it dont smoke in the morning nor after a long days unnin or anything only when i revv her up high
Old 09-02-04, 02:25 PM
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What color is the smoke?
Old 09-02-04, 02:26 PM
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Btw, I have a similar problem in my N/A. Took her to around 6.5 the other day (sitting there) and on the way back down there was a lot of popping. Oh well... I'll assume it's excess gas because I don't feel like thinking anything else .
Old 09-02-04, 02:30 PM
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a rele lite blu and white
Old 09-02-04, 02:51 PM
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sumtimes if i run it for a long time then rev it it wont wont smoke
Old 09-02-04, 03:02 PM
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don't worry about it, end of story!
Old 09-02-04, 03:13 PM
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does it look like this

these are both from my car

http://myweb.cableone.net/mjbless/bcool_flames.wmv

http://myweb.cableone.net/mjbless/pyrorev.wmv
Old 09-02-04, 03:20 PM
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Originally Posted by SonicRaT
don't worry about it, end of story!
Not sure if I agree with you here...

Yes, rotary engines combined with an open exhaust commonly backfire, pop, or afterburn. However, you don’t have to accept it and you can stop it.

There are two major components that you need to have for your car not to backfire. #1: A properly adjusted throttle body. (Especially the Dashpot) #2: The Air Control Valve (ACV) and an Air Pump.

If you have these systems in place and your car has ‘afterburn’ then you’ll need to trouble shoot them according to the FSM. If these components have been removed like they commonly do in the name of simplicity, then you’ll need to replace them or live with the ‘popping’.
Old 09-02-04, 03:20 PM
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if you still have some cat left that will burn up, normally my car doesnt smoke on a backfire, but when theres a big one a puff of smoke comes out and you can smell that cat cooking.
Old 09-02-04, 03:24 PM
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Deetz in case no one answered ur question a/f is air to fuel....and ken i guess you got me good there...since a car does breath from the front and release out the back...LOL Wait its the car's potato shooter!!!! LMAO ok ok im sorry...
Old 09-02-04, 04:35 PM
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if i let my car sit over night and i get up the next morning as soon as i start it light blue smoke comes from both of my exhaust. I wonder what that is from
Old 09-02-04, 04:37 PM
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Originally Posted by Kenteth
you mean farting

burping would be setting your carb on fire because you time advanced way to far... and thats just friggin scary.
AHAHAHA!! I had an old Trans Am 400 that did that. I never could solve it. It would blow flames out of the carb cover and lick the windshiled.












I sold it.
Old 09-02-04, 04:46 PM
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Originally Posted by bcool
Oh man.
Old 09-02-04, 04:50 PM
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Originally Posted by blackbirdzach
AHAHAHA!! I had an old Trans Am 400 that did that. I never could solve it. It would blow flames out of the carb cover and lick the windshiled.



I sold it.
Sticking valves, advanved timing, or a combination will due that.
Old 09-02-04, 04:51 PM
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Originally Posted by Kenteth
Sticking valves, advanved timing, or a combination will due that.
I called it buyers remorse and sold it.
Old 09-02-04, 04:52 PM
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Plus the only highspeed turn that car would do was turn over.
Old 09-02-04, 05:04 PM
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Those are some tiny flames, need some bigger exhaust. My '87 sport would shoot 4 footers just revving at idle.
Old 09-02-04, 05:06 PM
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Old 09-02-04, 05:16 PM
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Dang thats a freaking flame!!!!!!!!!!!!!!!!!!!!!!!!!!!
Old 09-02-04, 05:35 PM
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My Hero!!!!
Old 09-02-04, 05:35 PM
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Originally Posted by SonicRaT
Those are some tiny flames, need some bigger exhaust. My '87 sport would shoot 4 footers just revving at idle.
What did you do to your car!?!?!?
Old 09-02-04, 05:38 PM
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Originally Posted by SonicRaT
Those are some tiny flames, need some bigger exhaust. My '87 sport would shoot 4 footers just revving at idle.

How the hell....tell me more


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