Still chasing the 5.5K to redline stumble. Other then that the engine runs strong.

I have inspected the ICM and there is a bump in the upper right of the potting compound. I dont recall if it was there when it was new, however it looks suspect to me. BTW this is not the OEM ICM, it came from Autozone just over a year ago.



Have you guys ever seen this before?
Cant this cause my stumble?

 

That could be your trouble, but whenever you have to replace something like the ICM, 02's, or anything like that, always use GM sensors, never ones from the local parts stores, they will give you nothing but headaches.



Nick