Did I miss you checking how much vacuum you have?OK..
Reassembled everything, took it for a drive. Stayed in town, driving around, seemed fine. Spent about 30-40 mins doing this..
- Valve cover gasket replaced
- Turbo disassembled, checked end play and wobble: Felt perfect
- Cleaned Turbo completely - including the VNT section Now it moves like butter. no bent vanes, no sloppiness where the actuator arm moves the ring..
- New Downpipe gasket, oil drain gasket, EGR Cooler gaskets
- New hardware (studs, nuts, etc)
- Checked/cleaned MAF and MAP
- Checked/cleaned intercooler pipes
- Removed, cleaned and reinstalled intake manifold, including new gasket
- WGA tested; holds vacuum as tested
- Vacuum canister under turbo holds vacuum as tested
Decided now's the time, let's hop on the bypass and get some speed...
Turned onto the on-ramp, accelerated to about 35-40, BEEEEP.. Limp mode.
Went to next exit and pulled over, whipped out the VCDS. P0299.. Requested: 2364mb, 1754.4mb actual.
N75 has been replaced
EGR was cleaned
All vacuum lines replaced
Vacuum check valve replaced
Air Filter replaced
I'm out of guesses, at this point.. Short of buying an EGR blockoff ant 'testing' to see if the EGR is not seating properly, I don't know what else to do..
PLEASE, throw me some ideas, if you have any more.. I'm at my wits end with this car now.
Sounds like you've found your problem.OK, pulled the cam cover again..
The lobes are quite worn.. I couldn't really see the lifters without tearing everything apart, but the cam lobes were definitely worn. Ridged along the lobe, scuffed a little, and the beveled edge was completely non-existent along the lift of the lobes..
you think that's really it? I mean, it's a $500+ guess.. lolSounds like you've found your problem.
Try installing a plate in the egr inlet hose, an EGR valve that's sticking open can cause a p0299. Plating it off temporarily can rule that out.No love...
Checked and/or fixed
- Vacuum Lines
- Tandem Pump
- Fuel Filter
- S-Boost hose (turbo outlet)
- Checked others for cracks, all good
- Turbo Service - No issue found
- Air Filter
I'm sure I'm missing stuff..
- VNT Actuator - Fine
- EGR - fine
- Intake manifold - Not bad, cleaned anyway
Boost pressure/smoke test - no issues found
VNT holds vacuum as intended, operates freely
Vacuum canister functions as intended.
Exhaust always seems to stink.. not like a regular diesel, but smells... idk.. dusty, or musty? hard to explain.
Cleared codes, drove it, took a highway entrance ramp (my normal test route) and low n behold... at about 60mph while accelerating up the on-ramp.. BOOM: limp mode...
Came home P0299..
Monitor the maf desired vs actual while driving and see what you get.On your suggestion, I made a blockoff plate for the EGR tube.. no change, other that an EGR Flow code.
On the other suggestion, I backed the 3 downpipe nuts off to the end, and slid the downpipe back, so there was plenty of exhaust escape..
No change on either; I still get the P0299 code.
After awhile, my desires diminished LOL I'll get motivated in the next week or so.Sheesh dude, you left us hanging. The legions of limp mode sufferers are awaiting the final outcome.
Will do..Monitor the maf desired vs actual while driving and see what you get.
I just fake it til I make itI truly understand the frustrated fatigue factor. You've been at this journey for over a year. I've only been after the same limp monkey on my back for about four months, and I'm pulling my hair out already. At least you seem to know how to run diagnostics via VCDS. I'm not there yet.