i posted this a couple weeks back and didnt get much info so ill try again.i have an 01 itr stock besides aem cai and a uni exhaust....my bumber and part of the spoiler is getting stained black really bad my buddy told me it was running rich he told me to pull a plug i did and the thread are very black and the tip is an ashy brown color....i tried moving the exhaust out from the car more and it didnt help any...the car has 31k miles and i bough it with 30k the plugs were replaced when i bought it i got it as a certified used car at a local acura dealership.i have the 100k powertrain and am afraid if i take it to the dealer they will fuck me by saying the intake and exhaust caused this and void the warrenty please help! i thought about an aftermarket fuel pressure regular and some dyno time or a more costly apexi vafc if nesscary?

 

your best bet is to take it to a shop were someone can diagnose the symptoms and you can go from there, but remember, take it to a good reputable shop. :twisted:

 

Blah most of the Rs that I have seen in stock form dity themselfs, If I don't wsah my car at least once a week the rear bumper is nasty black.
You can put a VAFC on the car and get it tuned which will help a lot, maybe not 100% but some.

The ITRs just seem to burn oil and run rich in stock form, nothing much to worry about.

Just make sure that the car is maintained correctly and you should have min headches.

 

My thoughts exactly

 

As mentioned the car is acting normally. Stock R's run rich. Lean it out by tuning it and it will still get the rear bumper dirty. Dirty doesn't mean something is wrong. If you get on it less and drive it easier it will get less dirty too but what fun is that.

Wash the car more . . . .

 

You are fine. there is nothing to worry about.

 

i took it to the dealer i had a bad o2 sensor, but hte cel never came on strange?

 

Did they replace it for free?

and did they show you or explain how it was bad to you?

 

yeah they replaced it for free they basically told me the first o2 sensor was lazy and not kicking it over to run lean it was just running hellah rich. thats pretty much the exact words from the service advisor a lazy o2 sensor