Why does my car run Rough? on 1991 Buick Regal

I replaced two coil packs, it ran ok. One day I was driving and the car shut off. i tried to start it then it back fired. It started up after 5 mins or so. It drove home fine. I was driving it the next morning it was running rough. I thought it was the other coil pack that needed replacement. I did that, but it was the same. I replaced the wires, still the same thing. What do I do now?

by in Santa Maria, CA on May 22, 2010
1 answer 1 comment
ANSWER by on August 25, 2010
try the lamba sensors
COMMENT by on November 18, 2010
It may be one of your fuses try the e.c.u. fuse and make sure it is still a good fuse and if it not that then check all of your sensors some times they come loose or crack.

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