Well, just finished my seafoam job, put half in the crankcase as instructed, and the other half into the vac line. It all went smoothly, it sucked it up, blew the white smoke and in all did it's job, but the problem came after everything was put back together. I got driving with it to run through a few WOT passes to get everything out of the vac lines and it started stuttering a lot and the check engine light started wigging out and flashing like a christmas light so I ran down to autozone to have the codes pulled and I had a misfire on all cylinders and the general consensus between the autozone worker and several mechanic friends is that I fouled the **** out of all my spark plugs.

Is that the logical reason or could something else potentially have been buggered up? If it is just the plugs, I know the main recommendation is for NGKs but which is most advised for my car, iridium or platinum?

Any and all help will be appreciated,

TIA

 

85% chance just plugs are fouled, although sometimes it messes up your O2 sensors.

neither, NGK BKR6E if your stock, BKR7E if chipped gapped to .030 (+/- .002). copper is the way to go. sure they dont last 50k miles but if you are that lazy you sacrifice performance for an extra hour of your time per year changing plugs, you shouldnt be driving an Audi.

 

since when does it take an hour to change plugs? 15 minutes per plug? What?

 

haha some people are slow I guess..

but yea its probably your plugs, and if its not, change them anyways

 

^hes got a 2.8, so it's a bit more of a PITA

hope it's just fouled plugs...gl!

 

redline you failed to see the purpose of sigs. like quattroa4 said he has a 2.8 which is a v6 so he has 6 plugs instead of 4. also he needs to move the coolant reservoir and airbox in order to get to the back ones because the plugs are about 8 inches deep so he needs a 12" extension.

OP: it's probably just fouled plugs, just take them out and clean them. also you'll need to change your oil soon, around 50 miles. 1/2 can into the vacuum is a lot of seafoam. it shouldn't misfire after a littler of driving though. clear the codes and keep driving. if any codes come back, clear them again. what i did was use 1/3 in the crank, 1/3 in vacuum and the rest in the gas tank.

 

Thanks all for the replies

Hiwords: The DIY I found on the zine said a full can to the gas and half to the vac and the other half to the crankcase, so that may explain why they fouled up so bad. So the copper plugs yield better performance for stock? I'm fine with changing them every 50k, they may be a PITA for my engine, but better performance is fine with me. Not to mention, iridium NGKs are expensive as hell, the copper ones are only $2.49 + tax.

 

ya the copper ones are a little better but they don't last but good thing they are much cheaper lol. i replaced mine with bosch platinum +2 s when i got my car 2 years back. i could swear my car was still running on stock plugs and the nodes were totally gone but somehow the engine ran fine haha. i hope everything works out for you man

 

it is pretty much expected that the plugs are going to be all gunked up after seafoam... Clean them with a wire grill brush and they should be fine, otherwise just buy new ones.

 

Yea, I had figured they'd foul up pretty bad, I'm fairly certain the previous owner probably never did a seafoam treatment or something similar so there was probably a ton of gunk built up in there. I'm going to try to get them changed out tonight after class cuz I don't want to be driving with misfiring cylinders for too long cuz I can't afford new cats right now, so I'll post my progress once things are taken care of.