1.9TDI PD 130 boost problem
Iím having some trouble with my A6 1.9TDI PD, AWX, 130HP engine, year 2002.
It has been running very fine over the last 5 years, but know Iím having an issue with the boost control.
Upon accelerating, the boost suddenly spikes, and gives a little kick in the back. Certainly not very healthy with a cold engine and -5 degrees outside.
The engine does not react smoothly to pedal movements, and Iím also sometimes having a trouble code when reading out with VAGCOM:
17964 - Charge Pressure Control: Negative Deviation
P1556 - 35-00 - -
After having a long run on cruise control, the car refuses to accelerate when pushing the pedal, or only a tiny bit, then it gives the trouble code.
Looks that it does not want to accelerate due to the absence of boost. (charge pressure control valve stuck in Ďno boostí position?)
Iíve already checked the N75 charge pressure control solenoid valve, I measure 19 ohms (correct value according to workshop manual).
I can move the turbocharger actuating rod, moves smoothly, but it needs quite some force to move, donít know if this is normal.
Anyone has an idea what else I should be looking for?