How To Replace An Ignition Control Module ( GM 3800 ) 

I recently did this on my '98 GS (L67) and I found that NAPA can bench test these modules for free.

Simple job that most shops as I've found out earlier owning 3800 powered vehicles, act like its earth shatteringly hard. As I mentioned in comments I live in NY and they don't know how to "Fix" cars. The so called techs rely on looking at what year to our car is and if they see it's over 5 yrs old tell you to junk it and buy something that will be a brand new money pit. Great info.

This was literally a 15-20 minute job……. Thanks man🔥

Did mine in seven minutes plus two ignition coils,thanks mate! Mechanic was trying to charge me a ton of money...

Thanks for taking the time to share with us. By me Napa didn't check the ICM but Autozone does. I shouted Hallelujah in the store when the employee told me the ICM I had failed.

I would have cleaned the ignition control module with alcohol because it was pretty dirty the one you got in the junkyard and then put some thermal paste on it and then I eventually would have tried replacing the coil packs. They usually go. I could never understand why a lot of mechanics don't clean their area where their parts go in, it is very important. I've only found one good mechanic in my life that I only been about 2 years to him and then he went out during the pandemic. And he was the best and I'm almost 60 years old.

Great video and great information,, saved me some money,, fixed my issue with my 02 Monte Carlos SS,, changed the coil packs and module

Thanks for the demo. I’ve had a sudden and abrupt dead spot that’s caught the SES to flash, and hoping the one I just acquired fixes the problem

Good info. Exactly what I needed. Thanks...

Thanks Kids really help bring awareness to maintenance

Hell yea bro am gonna give it a try myself the shop is trying to charge me $600 including parts but auto one has it for less than $200 and I’ll save that money

Put a new crankshaft position sensor in it next also clean your mass airflow sensor, after that check the wires at your cam shaft sensor, if oil gets on them they will ark. I am going thru the same on my 97 supercharged park ave. Did you figure yours out yet? Take care.

Man I appreciate this!!! 💯👍🏽

Great video as always thumbs up

Great job thanks

Will a faulty ICM affect the way my car idles? Or voltage drop? I’ve done the EGR VALVE the idle air valve the tps alternator new battery and it still idles and varies up and down from right up under 1000 RPM to right above 1000 help please? I’m also fixing to do the knock sensor’s in it will the bad knock sensors make it idle like that.

Great,thank you.

Mine got the same problems imma do the ICM n see if it fixes it what did u do to finally fix it my brotha?

Try the coil packs as well if you haven't replaced them

I recommend some thermal paste between the control module to the heatsink. Doesn't matter the brand or anything. Without it you have a higher chance it'll over heat a fry itself in the nearish future.

I used a 7/32

So much easier than on a first gen W body!

Did you ever figure out what was going on with it? My 97 GTP does the same exact thing you were describing and I'm having difficulties tracking it down... Thanks! Love the videos!

should a Thermal Paste be applied to the bottom of the ICM prior to installing??

You forgot the thermal paste between the bottom of the ICM and the bracket for the heat sink I picked up a tube at Best buy last night for seven bucks

have to say great how to video

This looks like a difficult situation when it goes out on the vehicle. Good luck to those who are having this problem. Know someone who has a possible problem with their ICM.😮

What brand would you recommend? Delphi or Ac delco? Delphi is almost half the price of AC delco ICM

Do you know where I could find ignition control module mounting plate for 2004 gpt super charged..

My car runs bad like it has a misfire after replacing camshaft position sensor. was told I may need ICM so I bought and replaced the ICM but when I put the new one in the car will not start. Has p0336. put old one back on and it starts right up. But just runs poorly also getting a speed sensor left side code. It's getting very frustrating. Could you please give me any other things that I can check when looking to to see what is wrong with my car thanks in advance

I'm having the same problem with my Impala 3400 engine. Did the creator of this video ever fix the problem? Anyone have any ideas how to fix this issue? A friend of mine drove my car and burnt out the ignition switch. Now I'm having all these same issues.

My 99 gtp has the washer res inside the passenger front fender(shitty) and the coolant overflow right behind my supercharger pulley.. long story short a truck fell down on the hood a long time ago they replaced the hood but nothing else. It bent the engine mounts so now the supercharger pulley is digging into my coolant overflow... coolant stays in there and everything but I cant imagine its efficent on my boost... have you heard of anyone relocating these two? If so I would love any tips. Sorry about the long comment bud

So was this fix what caused it? my 04 impala ss does the same thing

I have a 2000 Buick Regal gs and for some reason after I’ve put the accel performance wires and coal packs on my car it started giving me a real powerful jerk I found out the coals weren’t firing so I took them off and ended up doing the zzp set up and still having the same problem I’ve changed the icm and the crank shaft position sensor still having that problem it only happens majority of the time when I try to get boost and won’t give me full boost gets to about 7.5 any suggestions?

So, in the end, what did the problem end up being?

Nice! I wonder why they aren't into cameras.

Excuse me Salem do you know the easy way to find out if my ECM it's going out ?

I replaced my module with a new one and it seems to misfire worse, I didn’t disconnect the battery could that be it?

Will this cause crank no start

all i took to the junkyard for this is a ratchet and two sockets

Some junkyard parts worry me. A module would be one of em.

Where you get all these cars to work on? You runnin a hot car ring?!🤔🤣

P

Wish I had seen this video before taking mine to a mechanic. Cost me 700$ for them to switch out the ICM, coils, and some spark plugs. Fuckin bullshit lol

Great video as always thumbs up