exhaust backfire
11-08-2008, 12:16 PM
Junior Member
JOURNEYMAN
Thread Starter
Join Date: Nov 2006
Location: san antonio,texas
Posts: 28
exhaust backfire
i need some clues here--- my car started backfiring out of the exhaust,
whats up with that ???
11-08-2008, 01:14 PM
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RACING JUNKIE
Join Date: Aug 2007
Posts: 1,523
Backfire
Normally it is an indication of a burnt exhaust valve. A compression check can confirm easily.
11-08-2008, 01:52 PM
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RACING JUNKIE
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Location: ILLINOIS
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is it backfiring on acceleration or when your letting off??more info??? LIVELY
11-08-2008, 01:59 PM
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RACING JUNKIE
Join Date: Apr 2003
Location: Greenville s.c.
Posts: 3,236
cracks (leaks) in the exhaust system can also cause this upon deceleration.. (maybe lively was getting to this)..check your exhuast from the headers back ..
imo
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11-09-2008, 01:05 PM
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JOURNEYMAN
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Location: san antonio,texas
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thanks for all the help !!!!
it only backfires when you let off the gas.
the only changes that were done was i installed a new set of headers. everything else is the same. it only seems to be #5 that it backfires from.
I pulled the plug and looks like it has not fired, it is real clean.
11-09-2008, 01:07 PM
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DYNO OPERATOR
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Location: New Orleans,La
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might have crack the plug during removal or intalation
11-09-2008, 01:08 PM
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11-09-2008, 03:00 PM
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JOURNEYMAN
Thread Starter
Join Date: Nov 2006
Location: san antonio,texas
Posts: 28
thank you everyone--- i found it !!!!
when I welded the header and grinded the welds we goy alittle to thin in one spot. Fixed it and ready to go.
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