exhaust backfire

[nova77]

i need some clues here--- my car started backfiring out of the exhaust,
whats up with that ???

[fla1976]

Normally it is an indication of a burnt exhaust valve. A compression check can confirm easily.

[lively]

is it backfiring on acceleration or when your letting off??more info??? LIVELY

[bjuice]

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 :D

[nova77]

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.

[FullTimeRacing]

might have crack the plug during removal or intalation

[FullTimeRacing]

disregard my last post

[nova77]

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.