Thread: stock pulley.... why am i knocking?

he's talking about replacing the o2 sensor, which he should.

Was talking about the o2 sensor.

It's mostly city driving and I'm not on the gas much at all. Can't figure out the gas milage issue... I cleaned my air filter (was really dirty) and maf but that didn't help. Should I pull the battery after to reset the fuel trims? I also plan on pullin off the throttle body to clean it this weekend.

Here are 3 scans I took yesterday:
Scan Depot dot net

Sorry to bump an old thread but I though I'd give an update.

Gas mileage issue was fixed by cleaning my throttle body, maf, cone filter, and going up a heat range in plugs (AL605s). I could literally scrape chunks of carbon off the throttle body with my fingernail that's how bad it was. I am going to have the egr tuned out so I don't have to deal with that again.

I've been off the gas the entire time with my knocking issue and I just discovered what was wrong this last weekend. I was very ignorant about the pulley I was running. I was having a friend put on a MPS this past weekend and he made a comment right away before we started that my pulley was much smaller than stock. We took it to the digital micrometer after it was off and it was a 3.3" pulley. I've been running that for 2 years with nothing but a 180tstat and cold air intake. I really had no experience with superchargers beforehand so I had no reason to not believe it was anything other than stock. Anyways, I put on a 3.6 now and will be putting in AL104s once again and I should be completely knock free afterwards.

I bought my car used about 3 years ago. The guy told me it was completely stock and that he's never had any issues at all with it. Well after I've bought it so far I found out that it was in the dealership and had piston issues and had it all rebuilt and that it had a 3.3" pulley on a stock motor this entire time. I don't know how the hell it lasted this long and I'm lucky I caught it now and that I haven't been beating on it too much over the past 3 years.

Learned my lesson(s).

yeah, that pulley is way too small. if the guy said it was stock im not sure that i would have even bought the car if it had a different pulley than the stock one..

I wish I knew half as much about these cars back when I bought it as I do now. At the time I was looking for a low mileage car that wasn't overpriced. Bought it for $13,500 with only 30k miles on it. The guy actually owed more on it than what he got for selling it. I guess I know why now and learned my lesson the hard way. I can't complain much though, it's been a very reliable DD so far with no major problems (knock on wood).