No spark under certain voltage (Page 2/2) Patrick APR 27, 08:02 PM quote Originally posted by Xenoblast: welp, another one broke. ICM? If so, was it an ACDelco unit? Did you use proper heat sink compound (not grease) between the underside of the ICM and the base of the distributor? Did you replace the pickup coil inside the distributor? (This is often recommended when the ICM is replaced.) Xenoblast APR 27, 08:46 PM quote Originally posted by Patrick: ICM? If so, was it an ACDelco unit? Did you use proper heat sink compound (not grease) between the underside of the ICM and the base of the distributor? Did you replace the pickup coil inside the distributor? (This is often recommended when the ICM is replaced.) I have no idea if it was acdelco, it was a spare from the previous owner. The one i just replaced it was acdelco. I used thermal paste, like the ones you would use for computer cpus on it last time. I did not replace the pickup coil.