Originally Posted by radomirthegreat
hasn't even been a year that I got new Duravomit ignition coils and NGK iridium plugs. I am about to change the wires to AC Delco,
Did you swap out the plug wires yet? Is it missing/spitting any at idle.. in Park? If not, disregard all the following.
If so, you can do this quick check at the coil secondaries:
Start engine; allow to stabilize; unplug IAC motor (not to exceed 2 min.); use insulated pliers (AND a rubber glove is great too); pull one plug wire at a time while listening for miss to get worse or stay the same.
Of course, if it stays the same, that is a bad plug, wire or coil.
Also, I found on mine, that if the coil is good, it will arc back to the coil body with the wire off. If one or both sides don't, suspect THAT coil.
I just had 2 coils die after they passed the resistance test days/weeks prior. Not now though.
The symptom prior to them completely dying was problems at acceleration... crappy spot if I nailed it and "shuddering" if accelerating in OD. To quote or misquote Willwren, "If it misses under load, it is ignition."