Another update for this 91 monty. Took ECU to local Mits dealer and had them send it to their preferred repair tech for diag. Comes back with repair needed on fuel pump circ and idle circ. <img src="/forums/images/graemlins/angry.gif" alt="" /> So for no reply from Avpro who was suppose to fix it. Didn't mind taking my $150 though. I know the ISC is bad and I am going to replace it. I have checked the TPS and it seems to be OK. Is there a way to check the idle switch that is in the TPS? <img src="/forums/images/graemlins/scared.gif" alt="" /> I may have another 4th of July in August <img src="/forums/images/graemlins/patriot.gif" alt="" />