My 99 still ran on 2 cylinders under those conditions.

 

crazy so you had no continuity across any of the pins? not just the 2 that were firing?

 

well i am going to overnight an icm from ecs just to be safe will advise how it goes

 

I have a '99 1.8T, so I have some experience with this kind of stuff, obviously. So if you switch coil packs and the misfiring followed that coil pack, then that one coil pack is your problem. Get a new coil pack ASAP and instal it in the cylinder that's giving you a misfire and a code.

 

Done that already. With new coil pack still cylinder 1 misfires which led me to think icm but I am confused that I get no continuity through it b/c afaik that means no coils should be firing.

EDIT: to be fair I first swapped in a used but working coil pack and went ~ 2 days without the code or rough running but then it came back. Then swapped in a NEW pack 2 days ago and now running like hell with a/c on and with a/c off very hesitant and sometimes jerky. You can definitely feel the misfires but if a/c is on the car feels like it will die and runs horribly.

 

OK, if you've done that already, then it's got to be your ICM. I've never had any other part to replace for a misfire other than a coil pack or an ICM in the cars 11 years.

Have you also checked your plugs? I've never had a bad plug ever, but you never know.

 

plugs are good gapped and torqued. SO overnighted icm on thursday it is I guess. have you ever heard of my current ICM's issue though? Scares me that no output pin has continuity with pin 3 on the input. Cannot find any thread with that. Also cannot understand how it runs at all with that.

 

That's good. No I haven't heard anything about your current ICM's issue. I never bothered checking my ICM's, I just replace them and forget it.

 

ok well as long as it runs I guess. And by 11am guaranteed on thursday I should have another to try. Hope it fixes it because this is my DD and I have a 6hr round trip coming up.

 

99 passat wagon 1.8

I'm having a problem with the #1 cylinder misfiring. I swapped ignition coils and plugs and still get the misfire on #1 only. I've read up on the icm going bad. But in most all cases its the #2 cylinder. Would that still be a reason or is there something else that can cause the misfire? There's no oil on the plugs and I listened for the injectors and both are clicking away. How can I test the icm to see If its the cause? I'm pretty motor illiterate but I can handle tasks once I know what I'm looking for. Also read up on a "pcv" valve?

 

When my last ICM failed it caused cylinder #1 to misfire, so just get a new ICM and you'll be good again.

 

Did you test the coils or anything first, or go straight to the icm? I just don't want to buy parts if it isn't going to fix the problem. Stuff gets expensive.

 

Well I tested the icm. Got no readout from the pin closest to the front. So assuming that's cylinder one... I ordered the new icm for seventy dollars. Hope it fixes the problem.

 

Get rid of the ICM. You can buy a used harness and 4 new coils, the latest version cheaper than a new ICM. Oh ya you get better spark and it is pretty easy to do.