Another Boost Loss, Oil Leak thread...

**sweetmeat** · 01-26-2009 04:38 PM

I have an AWE OTS Stage 3 tune, PJ Ko4s and thought I got bit by the turbo bug this weekend. Obviously, whenever something is wrong, this is the first thought.

Ive had a few different symptoms and I'm at a bit of a loss.

*Car starting loosing boost, only hits 17lbs and tapers to 15, as opposed to 21 to 19. This is consistent. I did a leak test and found a leak. Reclamped, system was good.

*Went to change the oil the same day. Had a bit of oil on the bottom of the oil pan and scattered throughout the bottom of the engine. Not alot, but oil nonetheless. Pulled off my IC hoses, found a very small amount.

I always have a CEL for O2 sensors, since Im running AWE DPs and Test Pipes. I just pulled the codes today to see if there were additional codes and found the following:

17530 - Oxygen (Lambda) Sensor Heating; B2 S2: Open Circuit P1122 - 35-00 - -
17526 - Oxygen (Lambda) Sensor Heating; B1 S2: Open Circuit P1118 - 35-00 - -
17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High P1114 - 35-00 - -
17548 - Oxygen (Lambda) Sensor; B2 S2: Internal Resistance too High P1140 - 35-00 - -
17862 - Exhaust Gas Temp Sensor 1 (G235): Short to Ground P1454 - 35-10 - - - Intermittent
17866 - Exhaust Gas Temp Sensor 2 (G236): Short to Ground P1458 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
16685 - Cylinder 1: Misfire Detected P0301 -
16688 - Cylinder 4: Misfire Detected P0304 -

I am going to replace the EGTs. This does not explain the oil. No whine, little smoke out of the exhaust, which has been relevant since owning.

Any thoughts?

**highPSI-S4** · 01-26-2009 04:47 PM

Change EGT for sure, but the oil not sure, are you able to see oil around either turbo?

**RolledMySTi** · 01-26-2009 04:48 PM

A small amount of oil in the IC's is normal. To fine a leak on the engine clean it real good, drive it around and look for fresh oil.

**sweetmeat** · 01-26-2009 05:02 PM

Originally Posted by highPSI-S4

Change EGT for sure, but the oil not sure, are you able to see oil around either turbo?

Most definately. As far as the oil around the turbo, No. I am going to continue to check.

**highPSI-S4** · 01-26-2009 05:05 PM

If there isn't any oil coming from up higher than the oil pan, I would think it was the oil pan gasket.

**2BblkAudis** · 01-26-2009 05:10 PM

I've had a small leak for a while and couldn't find where it was coming from until just recently. I thought it was my valve cover gasket which was installed recently during my timing belt job, but its actually coming from the timing chain tensioner.

http://www.ecstuning.com/stage/edpd/...iewimage.html#

Good luck.

**sweetmeat** · 01-26-2009 06:09 PM

Originally Posted by highPSI-S4

If there isn't any oil coming from up higher than the oil pan, I would think it was the oil pan gasket.

That was my initial thought. I am going to attempt to pinpoint the leak. Another thought was the filter not seated correctly or the oil plug washer.

**A62TURBO** · 01-26-2009 06:21 PM

As far as the oil, I had my rear main seal replaced a few months ago after months of complaining to Audi, they finally added some fluorescent dye to the oil and checked for leaks with a black light.

**sweetmeat** · 02-09-2009 01:07 PM

swapped the passenger side EGT this weekend (still waiting for my drivers side) and the short to ground changed to an 17863 - Implausible Signal.

I did not clear the codes, but its odds the code changed.