Why, when the air/fuel mix becomes too lean, does it explode in the intake and out the carb/TBI? I'm having this problem and I think that knowledge of the physics behind phonemon would aid in my diagnosis of the problem.

-Mark W.
<A HREF="http://www.angelfire.com/al3/thegreycar">'88 SC Camaro w/ 305 TBI</A>

 

yup, a lean condition usually. a lean mixture is much easier to ignite than a normal or rich one. If it's lean enough it'll ignite on the back of a hot valve or something, and blowup through the intake.

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