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Author Topic: exhaust backfire and popping sounds  (Read 2154 times)

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Offline pradtf

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exhaust backfire and popping sounds
« on: May 24, 2011, 01:27:44 PM »
we have a bit of it - nothing really explosive.
generally it seems to go away after the car is warmed up.

what sorts of things can cause this?
improper air/fuel mixture?
moisture in exhaust?
leak in exhaust?
timing?

our gasoline is good not old and we have new spark plugs installed.

i would appreciate suggestions on where to start investigation.

in friendship,
prad

Offline mudkicker715

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Re: exhaust backfire and popping sounds
« Reply #1 on: May 24, 2011, 01:51:46 PM »
Start at timing.

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Offline Jurjen

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Re: exhaust backfire and popping sounds
« Reply #2 on: May 24, 2011, 03:59:09 PM »
And then leaky exhaust near manifold or cracked exhaust manifold.
The exhaust manifold bolts like to unscrew themselves, so check those too.
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Offline BenM

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Re: exhaust backfire and popping sounds
« Reply #3 on: May 24, 2011, 10:02:24 PM »
Way too rich a choke can cause it to cook off in the cat. I've done that before.
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Offline philotomy

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Re: exhaust backfire and popping sounds
« Reply #4 on: May 24, 2011, 10:56:06 PM »
My Olds Omega used to do that, turned out to be a bad choke.
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Offline AMCKen

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Re: exhaust backfire and popping sounds
« Reply #5 on: May 25, 2011, 05:34:06 PM »
As was said, could be choke - too rich or lean for the engine temp until it warms up.
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