My 93 will start up and then die, sometimes it will start up just fine and run fine, other times I can get it started and rev it up but it wont idle and runs kinda rough. I have replaced the plugs and wires, The plugs are getting spark. Do you think it could be the ICM??

Thanks

Taylor

 

could very much be. when my icm took a dump, the car would turn on but wouldnt go over 3k rpm's. it would die as soon as it hit 3k. in D or in P. if you have a friend with an lt1 swap coils with icms to see it if fixes it.

 

I dont have any friends that have 93 LT1s. Can I use one off of a 94-97?? They have a different part number than the 93s.

Thanks

Taylor

 

Does anyone know if I can put a 94+ ICM in my 93??

Thanks

Taylor

 

Anyone?????

TTT

 

No you can not i just bought one i am haven same problem this week i replaced the coil.Icm.fuel pump regluter still have the problem but there a differce in the icm get one for a 93 good luck if you find the problem out let me know the same here

 

Ok now the car doesnt even start, it will act like it is going to start then backfire. I havent gotten to try a different ICM yet, but I know the plugs are getting spark. I bought this car about a month ago, it ran bad so I replaced the plugs, 3 were orginal with 118,000 miles on them, it ran great after that, then it started to miss so I decided to change the plug wires and the exhaust manifolds leak so I figured take them off and replace the gaskets and plug wires at the same time. So when I was doing that I found one or two plugs that were backing out so I figured that was the problem, well I got it all back together and it wont start. I check the wires and they are in the correct spots, I did them one at a time. I cant figure this out, I guess tomorrow I am going to buy a new ICM.

Taylor

 

i know that a 94 coil/icm will work on your 93. we took the coil with icm off my friends 94Z and put it on mine. it it fired right up.
so i think other years could work too?


after a while my car wouldnt start either. sounds like we have the same problem.

 

Idle control valve may need cleaning.It's that brass looking thing ,round,on the left side of the throttle body.Hope this helps.

 

man that sounds EXACTLY what happened to my car a couple of months ago, it was the icm, i bought one from napa and put it on it did the same thing, turns out that napa sold me a bad icm, and it took me a month to figure out that the one they sold me was bad