1989 Chevy Celebrity

May I ask, did you do any testing before you replaced the icm? Why did you replace the icm?

Are there any codes? If your losing spark and injector pulse intermittently, the first thing I think about is the crank sensor. Without that signal, there is no spark or injector pulse. The crank sensor is about 20 bucks, the icm is about 100. I'm not telling you to replace anything, but, a problem with the rpm signal, I test the cheap part first.

Did you check for B+ and ground at the icm. You need to test, when the problem occurs. Yes, tracking down intermittent problems can be a pain.

when i brought the car into the shop they said the problem was the icm...so i replaced it and it worked for about a week but now the car wont stay running for more than a minute or so...any ideas? could it be the computer or something else?

You could try to troubleshoot this yourself? Doing some of the basic tests and checking for codes is easy.

If you had the icm replaced recently, I'd call the shop and talk to them. A lot of shops will replace the coil pack-- plugs and wires-- along with the icm, encase one of the other issues caused the icm to go bad.

i dont have a code reader to do any futher testing....could the icm have been faulty?..only the icm was replaced and it worked for a little bit.

Your obd1, you don't need a code reader. You can use a jumper wire between the A&B terminals at the data link connector, then turn on the key, no crank, just turn the key till the dash lites come on. The mil should start flashing, you count the flashes to get the codes.

as it turns out the fuel pump is going out..what a pain in the butt.you have been very helpful and i thank you for your time replying back to my problem..thanks again..keep up the good work.