What causes this?

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Feb 19, 2004 | 12:05 PM

#1

ScottJM

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What causes this?

I just wanted to what cause an engine to backfire/pop during deceleration? I've been told its either not enough back pressure or the engine is runing to rich. I dont know which one to lean toward any help wpould be great. Thanks Scott

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Feb 19, 2004 | 12:23 PM

#2

jwtaylor

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could also be timing off or vacuum leak.

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Feb 19, 2004 | 03:50 PM

#3

Mike G

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From: Littleton, CO

Used to have this problem when my points were going bad....

--Mike G

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Feb 20, 2004 | 02:21 AM

#4

Ford427Strokr

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From: NC

Check low timing and firing order. If the motor has been modded check valvetrain to see if any of your intake valves are being held open during ignition.

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Feb 20, 2004 | 09:23 AM

#5

steell

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From: Indiana

If it's backfiring out the exhaust, look for exhaust leaks near the exhaust manifold and check your spark plugs to see if you are running rich.

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Feb 20, 2004 | 07:18 PM

#6

71swissaqua

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From: Huntersville

Also had a stock carb with the throttle shafts severly worn letting it suck in air. it would pop and rumble when slowing down. I kind of thought it sounded pretty good though. Wish I could get that sound back with these silly flow masters
Clint

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