IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Hill1430 on July 24 2022, 11:20:49 PM

Title: Coil Pack Question
Post by: Hill1430 on July 24 2022, 11:20:49 PM

Went to remove my coil pack to replace it. What I found was some industrial strength light green goo. I think it would take forever to try to clean up this mess. I found an ignition module on Rock Auto, GM Genuine for $149.00. The part number is the same as AC Delco. I hate to spend the money, but it might be a better option. Thoughts? Also I tried to post a photo taken from my iPhone, but am having no luck.

Title: Re: Coil Pack Question
Post by: Scoobum on July 24 2022, 11:31:21 PM

.

https://www.youtube.com/watch?v=-6vyll2bkmk

Title: Re: Coil Pack Question
Post by: Hill1430 on July 24 2022, 11:53:46 PM

WOW. Thanks for the video. I guess I need to replace both. Surprised the car ran good when I parked it almost three years ago.

Title: Re: Coil Pack Question
Post by: Steve Wood on July 25 2022, 10:02:45 AM

I have found that when the coil goes bad (some times the sign is that the resistance of each coil pack is no longer between 11-13000 ohms-this is probably 80% true as an indicator), it puts a strain on the module so that it may fail sometime after.  Therefore, it's a good idea to go ahead and be prepared to change it as well.

Gooey potting compound as yours was, tells you that the module has been overheating and is well on its way to failure.

When the module fails, it does not always mean the coil is fixing to but it won't hurt to change it if you want to.  If the coil was still in range, put it on the shelf because some of the new stuff may not last nearly as long as the original.

If the coil fails, it puts a lot of strain on the module and that means it probably should be replaced as a preventative measure.  Again, if it was running okay when you discovered it, I would put it on the shelf as back up just in case as I said about the coil :)

Title: Re: Coil Pack Question
Post by: Hill1430 on July 25 2022, 10:33:27 AM

Thanks! I will save it if I can clean the goo off of it.

Title: Re: Coil Pack Question
Post by: Scoobum on July 25 2022, 11:01:37 AM

You can test the coil pack as I'm doing here. Even if it tests good it might not be. Introduce heat to the equation and things can change. I tested coil packs at the track. If I could do a WOT blast down the track and it revved out clean, only then would I call it good and keep it as a spare. I'd have coil packs pop a coil at WOT every now and again and drop 2 cylinders. It'd be like I threw a boat anchor out the window the car slowed so fast.

https://www.youtube.com/watch?v=B9zHzfIcN8A

Title: Re: Coil Pack Question
Post by: Steve Wood on July 25 2022, 11:52:50 AM

Quote from: Hill1430 on July 25 2022, 10:33:27 AM

Thanks! I will save it if I can clean the goo off of it.

If it is gooey, it's toast

Title: Re: Coil Pack Question
Post by: Hill1430 on July 25 2022, 12:55:55 PM

you guys are great! thanks for the help.