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Posted on Jan 02, 2017
you could put the pickup on a cylinder pressure test and see if you have a bad valve causing the engine to pop.
you could have a bad wire or spark plug.
the timming chain could of went off a cog on the timming sprokets causing to pop.
gettin to much gas could cause it to.
Posted on Jan 23, 2009
Float is stuck in carburetor needle and seat probably stuck open remove the top of carb Check for dirt in the float bowl spray clean with carb cleaner try turning over the motor and see if fuel stops when bowl is 2/3 rds full if not clean again and make sure you have a in-line fuel filter installed also.
Posted on Feb 03, 2009
SOURCE: Chevy 454 back fire
Ignition timing is set by the computer as long as the distributor pickup point is within reason.
It could be running too lean. One of the TBI injectors may be sticking or not working (wiring or computer problem), or fuel pressure could be low.
Posted on May 21, 2009
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