TurboJew

Ok guys, here's the issue: under full boost, my car stumbles (miss? ping? who knows?). I'm running a 1993 S4 with an ASW chip. I'm going to change the plugs for starters, as I pulled them all and they looked like they'd been there for awhile. I maintain it. This week I changed the oil (mobil 1 15w50) and installed a new oxygen sensor. The car runs fine otherwise. I thought it was a temperature related miss, because it started happening when it was over 90, but now its in the 60's and its still missing. Any suggestions? I'm thinking either a POS or a coilpack is on its way out. How do I test those for proper operation?

Thanks,
Rich

randerson22

I have a '95.5 with the same problem, changed all the plugs and even plug boots. Next will be to check coils and then the POS. From what I have heard, it could be either. Heck, it could be a hose leak too.

I think I can switch the cover with someone else and that will verify if it's the coil. If it's not that, then there is some way to use the "extra / 6th" plug in the POS area to see if one is defective.
Sorry, I'm not that mechanically inclined so my explanation is a bit to be desired, but I'm sure someone else will advise you how to do that.

Robert
1995.5 S6 avant, 68,000 miles, IA stage III+, ECS stage II, Eibach/Billstein Sport

UrS4boy

new F5DPOR (accept no substitute) plugs (torqued to 22 lb ft). Could also be less than 94 octane fuel and/or bad knock sensor (Cody?). Mihnea: what do you think?

Dave F.

Mr.FRU-T-Pants

Are you still on the same tank o' gas?

TurboJew

I'm running 93 octane (thats the best in wisconsin) on a chip that was tuned in Colorado by ASW, and they have 91 octane there. The plugs that are in the car are correct, but I'm going to replace them as a first step.

UrS4boy

What happened after you replaced your plugs with new ones. Problem solved?

TurboJew

I ordered a "tuneup kit" from Blaufergnugen on friday, which is new plugs and caps (the pieces between the coil and the plug. The caps are out of stock and I wont get them until I'm back from Waterfest. plugs should be here on monday and I'll post what happens.