What causes backfire through air flow system on 1990 Pontiac Bonneville

changed mass air flow and crank sensor won't stay running any more tried catalytic converter didnt work

by in Sparta, TN on March 20, 2012
1 answer 1 comment
ANSWER by on March 20, 2012
TAKE IT IN AND HAVE IT DIAG BY A MECH YOU ARE WASTING $
COMMENT by on March 23, 2012
alright i figured as much my wife has been sayin the same thing but its no fun listening to her that would be to easy lol