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Backfire during decelleration

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ron wilson

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I have a74 MGB that backfires a lot during decelleration. Is this a sign that the mixture is too rich. Mufflers are shot also.
 
dklawson

dklawson

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As mentioned, you have an exhaust leak. Don't limit your search for it by looking at the muffler. Look for perforations in the pipes, leaks at the pipe joints, and the flanges to the cylinder head. It's amazing how sealing all those minute leaks can make backfiring on decel go away.
 
vping

vping

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Say your system was intact without holes. Might you get some backfiring during deceleration?
 
7

77v8

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Had the same problem as you, turned out to be the gulp valve was bad.Do you still have the smog stuff on?
 
B

Billm

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Yep- mine was the gulp valve too. Finished removing ALL of the smog stuff and the backfiring stopped.
Bill
 
Nunyas

Nunyas

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problem solved! a leak inna exhaust! NEXT! /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
 
DrEntropy

DrEntropy

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Now we can completely divert THIS thread! /bcforum/images/%%GRAEMLIN_URL%%/devilgrin.gif
 
Nunyas

Nunyas

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i painted a wheel today...
 
D

Deleted member 3577

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I'm considering replacing my analog Lucas flasher relay with a solid state look alike....

Will this psychologically damage my car's ego?
 
Nunyas

Nunyas

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I'm not sure... would you take an ego hit if you had a pace maker installed? /bcforum/images/%%GRAEMLIN_URL%%/jester.gif
 
DrEntropy

DrEntropy

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Voluntarily?

...I think not. /bcforum/images/%%GRAEMLIN_URL%%/smirk.gif
 
D

Deleted member 3577

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Nunyas said:
i painted a wheel today...
Click to expand...
Nunyas said:
I'm not sure... would you take an ego hit if you had a pace maker installed? /bcforum/images/%%GRAEMLIN_URL%%/jester.gif
Click to expand...
Maybe I would if someone told me I needed to wear new makeup /bcforum/images/%%GRAEMLIN_URL%%/whistle.gif .
 
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