@sierraferry: Yes, I replaced the small (and unreasonably expensive) filter under the FPR, and also the fuel filter behind the wheel, which I change regularly. The tires are not oversized, and I have checked and lubricated the wastegate actuator arm which indeed was stuck and I thought I'd found the problem but no difference. The new fuelpump is not a VDO, but today I connected a pressure monitor to where the fuel temperature sensor sits in the FPR and the pressure is well above 4 bars, almost 5 even when driving at high load uphills, no decrease at all in the pressure monitoring. BUT: strangest thing, with the pressure monitor connected It was performing wonderful, could even accelerate uphills! So, I put the fuel temp sensor back and the problem was back... disconnected the contact from the sensor and Voila! Perfect preformance!!
Bad sensor or something corrupt in the ECU. I am suspecting the ECU since I also found an error message from the gearbox: "P1884 CAN MESSAGE MD_IND INVALID" (no other errors), and strange Engine temp data from gearbox:
It never goes above 53 degrees...
So now I'm contemplating how to proceed? New temp sensor? New ECU? Other Ideas? Are there any negative effects driving without the temp sensor connected?
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