![]() I'm still not convinced that the MAF is okay and might try replacing it, the other think is I'm wondering if there is too much back pressure, a blocked exhaust but it's going to be hard to separate due to being welded. The inlet track is all okay no air leaks. The air filter was blocked so that has been replaced, no improvement. It appears that there is a low air mass, this requires fixing and it will hopefully fix the turbo fault. With the MAF disconnected the actual air mass defaults to actual 550mg. Looking at the measure values saved at 2326rpm air mass calculated 850mg actual 430mg charge pressure 1836mbar actual 1071mbar. I have disconnected the MAF and that makes a slight improvement. Note: Group 000 and any other group that displays 10 fields instead of 4 is an exception. At the present time, all scaling conversions are to metric (SI) units. Low rpm it now feels better but is still flat up through the rev range, no turbo operation. You cant hurt anything with the Measuring Blocks function VCDS will attempt to 'scale' the raw data coming from the Control Module into real-world units like degrees C, km/h, etc. Both the sensors have been replaced and the fault codes cleared, I have adjusted the pump timing as it was along way advanced. It had fault codes relating to the engine coolant temp sensor and also the fuel temperature sensor inside the fuel pump. I have got a VW T4 2.5 TDI with a lack of power, engine code ACV.
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