#%^ BACKFIRE

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MY 85 FJ60 W/HEADER,NO CAT CONVERTER,DE-SMOGED.
RUNS GREAT,STARTS GREAT BUT BACKFIRES LIKE HELL WHEN I LET OFF THE GAS AT ALMOST ANY SPEED(WORSE WITH SPEED)CARB. HAS BEEN REBUILT BY JIM CHENOWITH 1000 MILES AGO,TRUCK DID NOT BACKFIRE BEFORE WORK WAS DONE.ANY IDEAS?
 

73lndcrsr

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May 28, 2002
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How is the jetting? &nbsp:Do your plugs look okay? It sounds like it could either be too lean or you may have a timing issue.

Hope this helps.

BTW your plugs should be a light tan color.
 
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This is one of the unintended consequences of "de-smogging". Re-install the throttle positioner on the carb and hook it up to the VSV so that it works properly and the backfiring will go away.
 
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:D :D :D
HEY,I FIGURED IT OUT MYSELF UNSCREWED MY FUEL CUTOFF
AND THERE WAS A BIG BUGER IN THE END OF IT, SPRAYED SOME CARB CLEANER IN IT AND THE HOLE WEAR IT THREADS AND WALA NO MORE #%^ BACKFIRE.I LOVE MY CRUISER!!!! :G :G :beer:
 

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