I have an 87 GN. The problem I am having with the car is that it want s to cut out at a certain RPM. It is usually right before it shifts when driving normally. Its like you are turning the ignition off and on again. If I floor the car, it stops and the car goes on. I have changed the MAF, IAC, coil pack and module, and ECM from my 86 GN which runs perfectly, but none of this stuff has helped. I also have Direct Scan, and none of the readings go crazy when it does this. The only thing I have found wrong with the car is that the IAC count goes to "0" once the car goes into closed loop. I have tried to adjust it with no luck. I have also sprayed starting fluid all over everything while it was running, but have found no vacuum leaks. Can anybody help with these problems? It would be greatly appreciated.