Post by squidgy970 on Dec 31, 2009 3:58:51 GMT -5
hi i have a 1995 pontiac firebird formula lt1 350, it has 1.6 rockers, no cat, maf screan removed, msd blaster coil and 6a box,automatic with 3 inch exhaust and flowmaster muffler, i have a problem when i get on it after it reaches operating temp, sometimes it will sputter and backfire until the ses light comes on, then the symptoms will go away, some times it will do this at high rpms and low rpms, i have recently replaced the opti wires plugs and all the sensors but the ect on the water pump, and also just replaced the ecm with stock tune still, and the icm, the car has run great for about three months after i have done this work,this problem is about 3 weeks old end every thing that i mentioned i have replaced has been done about 4 months ago some one please help, thanks.