i tried everything i know to do to get this crap to stop. i used a low octain fuel (87) i checked for intake and vacume leaks, none to be found.... there was however a missing nut connectin the plastic snorkle to the throttle body. but there were no leaks in conjunction with the missing nut.

would oxygen sensors have anything to do with it?? i need help! im open to all suggestions!

 

Working cats usually dont let flames happen,.. also check the ACV functions, particularly the anti afterburn valve.

 

what is and where is this anti after burn valve.. ive read about it and of course its self explanatory, but the repair manual only goes as far as tell you what it is but not where it is. also how is it fixed or repaird...how does it function...what do i need to do to test the valve for being defective????????