What about your gasoline octane grade ????
Gilbert
Le 10-09-10 ` 19:17, Leonard Berkowitz a icrit :
> Just read an old post concerning backfiring. My BJ7 has been back
> firing
> badly for about a year. I thought it was due to a small leak in the
> flex
> pipe, which I have repaired - no change. Someone mentioned lean
> mixture as a
> possible cause. I have reset my carbs to run about as rich as I can
> but this
> also has not helped. I do notice when the engine is cold there is
> less back
> firing. I'm not sure if that is because of the temperature or
> because the
> choke is pulled out giving me a very rich mixture. However with the
> engine
> hot and the choke out there is also a marked decrease in back
> firing. By the
> way the back firing only happens under maximum vacuum conditions,
> like going
> down hill or decelerating from high speeds with my foot off the
> gas. Other
> then the back firing I do not seem to have any other problems with
> the motor.
> Any suggestions!
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