I rememeber PM'ing a forum member from Oklahoma who did a tune up including replacing coils, then his car would mis-fire but only after a complete heat soak.
He even brought an oscilloscope home from work trying to find the problem.
He finally decided to put his old coils back on and that fixed the problem.
You'd think that putting some brand new parts on your car would make it run better and not make it fail
I have my old original coils in my trunk in case I need to replace them on the side of the road.
I replaced my coils shortly after joining this site and learning about all the weird and strange problems coils were causing.
I didn't know about the Hitachi coils at the time so went with Beck Arnley.
They've been fine for more than five years but I'm sure if I modded my car, they would fail.
He even brought an oscilloscope home from work trying to find the problem.
He finally decided to put his old coils back on and that fixed the problem.
You'd think that putting some brand new parts on your car would make it run better and not make it fail
I have my old original coils in my trunk in case I need to replace them on the side of the road.
I replaced my coils shortly after joining this site and learning about all the weird and strange problems coils were causing.
I didn't know about the Hitachi coils at the time so went with Beck Arnley.
They've been fine for more than five years but I'm sure if I modded my car, they would fail.