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den912

01-02-2012 10:03 AM

back fire

my 2.2 seems to backfire and pop a bit the distributor and leads seem to be fine I think, can this be down to low compression? If so what does it take to fix this? Is it a big job to fix?

Flat6pac

01-02-2012 12:12 PM

The backfire through the carbs is indictative of lean running or bad cam timing.
Bruce

GrantG

01-02-2012 01:46 PM

Quote:

Originally Posted by den912 (Post 6468162)

my 2.2 seems to backfire and pop a bit the distributor and leads seem to be fine I think, can this be down to low compression? If so what does it take to fix this? Is it a big job to fix?

Are you using MFI? If so, maybe your fuel-shutoff function is not working properly (the one triggered by the microswitch when throttle returns to idle position, but revs are still above idle).

tom1394racing

01-02-2012 02:31 PM

Backfire at partial throttle with carbs is often caused by plugged idle jets.

I ran my tank too low the other day and they plugged with moisture. Pulled them out, blew them out with compressed air. Problem solved.

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