exhaust popping
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,607
Likes: 7,053
From: New Or-leens Loo-z-anna
If your engine runs smoothly it could be an exhaust leak.
My problem was caused by a leaking exhaust where the exhaust manifold connected to the "down-pipe" on the driver's side.
I had to soak the three nuts that held the exhaust pipe flange in place with rust remover.......then remove the nuts....clean the threads on the studs......install new nuts and torque them down (my exhaust connection did not use a flat exhaust gasket or a "donut"......yours may have either or none).
My problem was caused by a leaking exhaust where the exhaust manifold connected to the "down-pipe" on the driver's side.
I had to soak the three nuts that held the exhaust pipe flange in place with rust remover.......then remove the nuts....clean the threads on the studs......install new nuts and torque them down (my exhaust connection did not use a flat exhaust gasket or a "donut"......yours may have either or none).
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,607
Likes: 7,053
From: New Or-leens Loo-z-anna
The leak is easy to hear when it is at the gasket between the head and the exhaust manifold, but my leak was further down.
I couldn't hear one either at the flange because of the semi-loud mufflers.
I held a piece of paper about 1/2" wide by 4" long by one end....I moved it around the flange and it began fluttering when it got near the leaking area.
A leak is the easiest problem to check for. Burned points in the distributor would be next on the list.
Wait for other members to reply who have more knowledge of engines.
I couldn't hear one either at the flange because of the semi-loud mufflers.
I held a piece of paper about 1/2" wide by 4" long by one end....I moved it around the flange and it began fluttering when it got near the leaking area.
A leak is the easiest problem to check for. Burned points in the distributor would be next on the list.
Wait for other members to reply who have more knowledge of engines.
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
not enough info, what year and engine? do you have AIR setup on the vehicle? diverter valve being faulty will backfire on decel.
exhaust leaks, unburned fuel, etc. also something to check, as well as a burnt exhaust valve and incorrect timing...
exhaust leaks, unburned fuel, etc. also something to check, as well as a burnt exhaust valve and incorrect timing...
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blue by you,
Here's an interesting debate by two carb experts, can you try adjusting your idle mixture screws and post the results?
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Safety Car
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From: Orange County Ca
