| RE:95 LT1, Strange problem |
Subject: RE:95 LT1, Strange problem by bogus on 2007/4/5 1:08:01 The ICM is part of the coil. It's behind it. However, there is a lot more that could cause this than a bad opti. When was the last tune up? What plugs did you get? If you are running AC Delco Platinums, you are screwed... they suck. There are these little platinum pucks bonded to the ground strap that fall/burn off. The gap then grows from .050 to .065. Junk. Get NGK Platinum or Iridium. I really hate it when "experts" start blaming the opti at every turn. 1995-1997 LT1s had a vented opti. It had postive flow through ventilation. As such, much of the moisture related failures were ended. And most of those failures were caused by carbon tracing on the cap/rotor. Finally, without a wondering idle, I don't think it's even the cap/rotor. The symptoms of a bad opti: 1. Codes. This means the electronics are failing. 2. wondering idle. This means that the cap/rotor are not effectively passing the voltage, the computer senses the misfire and tries to adjust timing. It's a no-win situation. 3. high rpm miss. This is the same as #2... but without the wondering RPM. It just misses. Check the coil wire. Make sure it's a) not chaffed and b) that it's connected to the opti and the coil completely. Check the coil wire terminal ends for burns and such as caused by arcing. |
