whoa
10+ Year Contributor
- 32
- 0
- Sep 23, 2009
-
Portland,
Oregon
Hey all. I've been a lurker on these boards for a long time, I recently acquired a 2g talon tsi awd from a buddy. I have helped him with this car for a couple years.
Just some background info on this problem. The car would barely start after 5 mins or so. When it did start, it had trouble idling by itself until it was warmed up. We rented an ECU code reader from Autozone and found that the MAF was bad, this was the only code that the reader pulled. They didn't have the MAF at Autozone, so we went back, started up the car just to let it run for a bit while we went to another Autozone to pick up the part. Turns out this Autozone is closed, so we head back. It's been probably 20 minutes now. We turn down the street and see huge billowing clouds of oil smoke coming from this car. Uh crap.
So it turns out that the turbo has been spraying oil. Not quite sure why this happened but I have a theory I'd like to run by you all. When we pulled the oil cap off, probably a good 30-40 psi (guessing) blew out of it. This leads me to believe that the PCV is probably sticking or just not working at all, as I checked compression on all cylinders and got 185psi on each (not piston ring blow-by). What I'm thinking is that crankcase pressure built up, adding more pressure to the oil system and leading to turbo seal blow-out. Is this possible?
I picked up a MAF used from a member of this board today and popped that in, the car starts up just fine now but still idles terribly and will not rev past 1.5k. When I pull the intake tube off the turbo, I can see a good amount of oil in there. Pressure is still building in the crankcase, I have not replaced the PCV yet. Going to go pick one up right now.
Does anyone have any advice for me?
Just some background info on this problem. The car would barely start after 5 mins or so. When it did start, it had trouble idling by itself until it was warmed up. We rented an ECU code reader from Autozone and found that the MAF was bad, this was the only code that the reader pulled. They didn't have the MAF at Autozone, so we went back, started up the car just to let it run for a bit while we went to another Autozone to pick up the part. Turns out this Autozone is closed, so we head back. It's been probably 20 minutes now. We turn down the street and see huge billowing clouds of oil smoke coming from this car. Uh crap.
So it turns out that the turbo has been spraying oil. Not quite sure why this happened but I have a theory I'd like to run by you all. When we pulled the oil cap off, probably a good 30-40 psi (guessing) blew out of it. This leads me to believe that the PCV is probably sticking or just not working at all, as I checked compression on all cylinders and got 185psi on each (not piston ring blow-by). What I'm thinking is that crankcase pressure built up, adding more pressure to the oil system and leading to turbo seal blow-out. Is this possible?
I picked up a MAF used from a member of this board today and popped that in, the car starts up just fine now but still idles terribly and will not rev past 1.5k. When I pull the intake tube off the turbo, I can see a good amount of oil in there. Pressure is still building in the crankcase, I have not replaced the PCV yet. Going to go pick one up right now.
Does anyone have any advice for me?