Glad you found the problem, I`ve been having problems with my D 150 for awhile now it would just stop running and when I race it it would start missing at high rpms, I changed plugs, plug wires , cap and rotor, gas filter, I even put the stock computer back in and still had the same problem. Well today I went to take it out of the trailer ( its winter resting spot) to take it to a body shop to get an estimate on some touch up work and it wouldn`t stay running, it would start run awhile then shut off again, then be hard starting. Years ago I put in an Accel coil I decided to put the stock coil back in to see what would happen, Well it started right up and the miss went away, anybody else have a problem with these coils?