For a little while I've been having an issue starting the car in wet/damp weather and from the searches here it looks like a combination of the two is to blame.

The car has 147,000 miles on it and has the original coil & icm.

Is there any specific recommendations on which coil & icm to get or for the most part are they all the same for my 'lightly' modded car?

Thanks.

 

GM ICM is the best. Coil does not matter so much. an Oreilly's re-man worked for me just recently, and it has a lifetime guarantee.

What symptoms other than hard to start?
How long since you changed your plugs?

 

Plugs --- not too long ago ... maybe 1,000 miles at most.

Car runs GREAT when the weather is fine. If it rained during the day I can't start it ... It cranks and cranks and goes putt-putt with a quick stall out. I also notice the RPM during crank registers quite low. From doing the search around here it seems a few others have encountered the same issue and have resolved it this way.

Where do you get the ICM from? Dealership only?

 

Old timer here.Use a G.M. Coil.Been down the road with the after market crap.My02.

 

Rock Auto stocks AC Delco ICMs.

AC Delco ICMs/

 

Don't overlook plug wires. They can cause that exact symptom when they get old.

 

The ICM can be tested at any good auto store. You need to take it off for the test. The coil cannot be tested.
I think you will find GM wants over 200 dollars for an ICM. I agree that the GM is the way to go. But coils, ...they are cheap. Plug wires are a good investment too.

 

I did not know the ICM could be tested ... So advanced auto or auto zone can test it?

 

I know Oreillys can, so I would think the other two could also.