Remapped t6 loss of boost/power after hitting goat, car perfectly repaired. No fault codes, all systems optimal on diagnostics.

[Savannah-Suntours]

After hitting a goat in Namibia that destroyed the intercooler and temperature censor, the car was repaired. After repairs I keep getting only 1,4 bar instead of 1,7 bar boost between 2000 and 3000 RPM. (the car was remapped using the Quantum Red File). No fault codes at all. All hardware in perfect condition (turbo, injectors). I am out of advice. Please help somebody.

 

[Savannah-Suntours]

After hitting a goat in Namibia that destroyed the intercooler and temperature censor, the car was repaired. After repairs I keep getting only 1,4 bar instead of 1,7 bar boost between 2000 and 3000 RPM. (the car was remapped using the Quantum Red File). No fault codes at all. All hardware in perfect condition (turbo, injectors). I am out of advice. Please help somebody.

I have now discovered after many diagnostics that there is a voltage drop in the aircon system that influences a lot of systems. Can it be a bad earth? Where do I look?

 

[DaveD]

I have now discovered after many diagnostics that there is a voltage drop in the aircon system that influences a lot of systems. Can it be a bad earth? Where do I look?

Welcome, I think the lack of members responses to your original post is likely to be because you've already done all of the things that we'd normally suggest, such as diagnostics. I'm afraid I can't help on the electronics but it would be unusual if a voltage drop in the air con system caused a loss of boost pressure, in my not very expert opinion.
Hopefully somebody with more knowledge in that area will be along soon.
Good luck.

 

[Savannah-Suntours]

Thank you Dave. I suspect that the lower voltage in the cabin affects some sub-systems, like for instance lower throttle signal to the control unit?

 

[Savannah-Suntours]

The low volts was due to a faulty aircon compressor solenoid. After replacing the compressor, it was fine again (the faulty solenoid bleached current). But engine boost and power remained lower than normal. We drove to the sea for a holiday. As we got nearer to the coast the power returned (from below 500m above sea level). It was wonderful driving mountain passes with full power. On the return trip as we passed 1000m, power was reduced again. (I stay 1300m above sea level. Apparently the VOLKSWAGEN TRANSPORTER T5 AIR PRESSURE SENSOR 068906391B is faulty (it determines your height above sea level for the ecu). Does anybody know it's location (it is not the MAP or MAF sensor)