92 Lesabre ECM PassKey 2 swap problems
My 92 Lesabre was stalling at random moments on the highway, then not starting for 5 or 10 minutes. To make a long story short, I ended up installing a new crank position sensor, a used ICM from a 91 Lesabre and the ECM & PassKey 2 module from a 93 Bonneville. I inserted the appropriate resistor to make the PassKey 2 system work by measuring the resistor on the ignition key for the Bonneville. Now, the car will start and run, but the "Check Engine" light is always on. I think that is because my 92 Lesabre doesn't have an EGR, so the ECM from the 93 Bonneville (which has an EGR) thinks there is a problem. I don't mind having the Check Engine light on, but the car has one other problem... When you start the engine hot, it coughs and shudders until you rev it up for a few seconds, then it runs normal. (This doesn't happen on a cold start.) I have tried putting the old ECM back in, but then the car just starts and runs for about 1 second. Should I try putting the memcal from the Lesabre ECM into the Bonneville ECM? If I do that, do I have to put the original PassKey 2 module from the Lesabre back in (and the resitor to match it)? My wife is really gettin on my case... need solution...I don't have much experience - just trying to figure this out as I go along...HELP!