Buick Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry your having this problem
with a new 1-4 coil and the 1-4 coil still will not send spark and the other 2 coils are sparking the problem is the ICM not firing the 1-4 coil
this usually happens from a bad coil with high resistance in it tat will damage the ICM
replacing the ICM will correct this problem of NO spark out of the 1-4 coil towers with the engine running
with the other coils firing and a new coil on 1-4 the only thing to cause this is a bad ICM nothing else will cause this with a new 1-4 coil and the other 2 coils sparking
how are you making out ?