6n2 2001 Polo 1.4TDI Running Rough

evoasis

Member
Joined
Jul 16, 2008
Location
Orange County, CA
TDI
None Yet
Hi all, it's been awhie since I've been on here... I am having a bit of rough running - no recent modifications, stock ecu - put about 14k on the car over the past year.

Here's a VCDS log, if anyone has any input.

Feel free to ask me questions, issue began whilst heading down the freeway at 70mph, rough running, lots of stinky not normal diesel smoke out exhaust.

https://drive.google.com/file/d/1z3XegBpaSxhVD01MZE-yd5t_afp1W-YM/view?usp=sharing



I know these don't exist in the states, but VAG TDIs are fairly similar in failure modes, right? Here's things I've tried (maybe incorrectly)

1) Checked/ replaced vacuum lines. Notice one going to turbo was melted shut, now has a fresh and tight new line going to it.

2) Put a couple PSI on turbo actuator - Saw the rod move accordingly. Unable to measure travel as it's kinda hidden away in the engine's rear.

3) Last year replaced the cam sensor (hence showing group 4 info) as it had a similar rough running issue and bad PD injection torsion value... I think I'm close enough as it is now, but can try adjusting.

4) Performed a really rough leak check around 15-20psi setup from egr valve inlet before manifold and airbox - no leak sounds noticed along piping. MAP sensor readouts seamed to match input pressure (around 16psi showed an increase to around 1090millibar) but I was doing this alone so it wasn't too accurate of a reading.
 
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