Have the dreaded misfire code, it doesn't seem like a full blown miss at least in my mind, maybe a weak miss or bad spray, have replaced the MAF which may have been a waste of money. I have ohmed the ICM, crank and cam sensor all good, checking the coils, it'* good on the top plugs but on the bottom I get .4/.2/.4, It says if there is difference, wondering if .2 is enough to make a week misfire? this make any sense?

Patiently awaiting your response

Sorry, already screwed up, and not that it makes much difference on this but it'* an 02 Lesabre

What'* compression doing?

I don't think it'* a compression issue, and honestly that'll be the last thing I check, at 160k miles it'll be junk if that'* bad. Right now I need to know if the .4/.2/.4 ohm reading on the primaries of the coils would be considered weak enough to make the motor stumble under load.

Seems the odd one is likely the problem. You could always swap coils around and see if the misfire code follows.

I've decided to replace all the coils, what'* everyone'* thoughts on replacing the ICM as well?

May as well while you're there.

Yeah, that'* what I was thinkin, got em my cart. Thanks!

I would suggest: Don't skimp on quality. Good coils and ICMs last a long time, not worth the slight savings to go with a cheap unit.

Just to let everyone know, coil packs and ICM fixed my problem.