02-05-2013, 10:36 PM
Join Date: May 2011
Total Cats: 10
Carbon Buildup on turbo, Car running poorly.
While I was headed home earlier I got into boost in 2nd gear, and was quickly greeted with a huge stumble; the car fell on its face. I lost most of my power, and had to nurse the car home (it would enter just enough boost for the BOV to be audible). It would barely idle at stop lights, and it frequently died. It was running very rich.
Upon further inspection, my downpipe has a 3"-4" crack at the elbow where it meets the turbo. It is also tremendously caked with carbon, along with the turbine exhaust housing. I had taken the downpipe off expecting to find oil, since ive had some in the charge pipes, and figured the turbo seals had just bit the dust.
so heres a rundown of the symptoms:
- No power
- missing boost
- stumbles/dies while idling
- running very rich
- 3"-4" crack in downpipe elbow
- massive carbon caked on downpipe/exhaust turbine
Could just the crack in the downpipe be causing these symptoms? Is it the stock O2 sensor reading a lean condition and trying to compensate? Or should I look elsewhere?
Here is a cat picture for your trouble: