1993 Chevy Caviler Z24 3.1L Coil Packs Replacement - Second Generation Forum

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1993 Chevy Caviler Z24 3.1L Coil Packs Replacement
Sunday, August 15, 2021 1:20 AM
Hi, I have recently picked up a 1993 Chevy Caviler Z24 for about 500 dollars. A project car, of sorts. Overall, there is not too much rust on it, considering I'm from Upper Michigan where there is lots of snow and salt. There is some frame rust, but it is a uni-body frame so it shouldn't be heat treated, I can just welt a piece of sheet still in the rust spot.
The issue I am having is there is a misfire making the car shake like a dog in a storm. To be honest, I'm not sure which 2 cylinders are misfiring. I am very sure that it is an issue with one of the coil packs. I used a spark tester and two of the spark plugs were firing almost exclusively at higher RPMs. I have been told that these coil packs are known for going bad in these types of cars, so I intend on replacing all 3 coil packs. However, it is EXTREMELY difficult to get to them. I cannot for the life of me fit my hands down into the car to get to the coil packs. I had only managed to get the middle pack replaced, the rest I had no luck with. It looks like I'd almost have to pull the entire radiator out from the bottom of the car to get to these darn coil packs. Does anybody have any idea of a better way to get to these packs?
I'm really hoping the misfire isn't due to some issue like stuck or blown piston rings, as that would be a whole other can of worms. I'm just trying to start with the easy issues first. Truth be told, I don't know how many miles the car truly has, as the Odometer is stuck at 40,000 miles. I guess that means it only has 40,000 miles
I would appreciate some help

Re: 1993 Chevy Caviler Z24 3.1L Coil Packs Replacement
Sunday, August 15, 2021 2:39 PM
Hi

When I replace coils, I remove the entire unit. I'll also re-paste the ICM while its out. For me, it is easier to remove the unit than to try to replace just the coils with it still mounted to the engine.
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