1991 Isuzu Impulse Electrical system Problems

“As the weather is getting warmer the engine revs and drops uncontrollably. The car also stalls at any speed. I have had it even stall on the highway. I hear this is a common problem on this particular type of ECM unit, please check into this for me. If I hadn't taken a defensive driving course I could be dead right now.”

“I have a 1991 Isuzu Impulse and it's having ecu problems. My mechanic says it needs to be replaced. I see that this is a recurring problem with these cars, and it shouldn't fall on the shoulders of the consumers.”

“When car warms up you cant drive or it will stall. Once warmed up it will not start. I saw an article on the isuzuperformance web site that said other vehicles have this problem. It also stated the reason for this problem is a faulty ecu computer made and installed by AC delco. I wish I would have had this information before I went out a bought parts to try to fix the problem myself. If its the computer, there is nothing I can do about that on my own. A response on this issue would be greatly appreciated. Thank you.”

“The vehicle fails to run after is warms up. I have contacted several mechanics and was told that it is a common problem. I was told that the manufacturer uses an insulating spray on the ecu that causes it to shrink and brake contacts in the unit itself. This is very dangerous in that it has left me stranded once already and with loose contact it my cause a fire. I do not expect the manufacturer to replace the unit for free. I bought the vehicle used so they did not make any money off of me but some help would be nice. …”

“The defects are due to the improper manufacturing of the ECM module of this vehicle. The symptoms include an erratic idle with the idle revving up and dropping to the point where the engine dies. The idling will jump up to 2000 RPM, linger there until I blip the throttle, sometimes up to 3 or 4 times. On one occasion, while driving on the freeway at 65mph, the engine began to stall with the idling moving erratically, and then suddenly the car went completely dead in the middle of the freeway. Luckily, I managed to coast off to the shoulder where I remained stranded for over four hours. …”