Hello,

Is the 1228747 ECM a know headache? I have it in my 89 burb and once again I have idle issues. Nothing i change will affect the IAC counts. One minute i have zero IAC and others I have 40+ IAC counts and the idles remains at 950.

I will go back over the TBI unit for leaks and obvious issues. I am not a wiz at TBI but with the tables and scalars what is it that really determines IAC. When I change something like the RPM vs coolant temp, nothing happens?

Thanks,
Chris