Tdi No Power,black Smoke,hesitates

[ianskill]

i know this has been discussed but still having problems with this .i have no power,hesitates low revs with black smoke.unplugging the maf makes it run ok.i have replaced the maf sensor with an aftermarket one and still the same.i purchased an aftermarket map sensor and still the same. a friend of mine plugged his laptop with some software.the car isnt showing any faults but there was no variation coming from the map sensor,was stuck at 255 kpa.you can actually hear the noise like a scraping,whirring noise as it struggles. does anyone know anything regarding the 255 kpa readings? thanks

[JONESERIC]

Hi IanSkill

 

I changed my cam belt on Saturday, as part of the job I routinely remove a lot of bits and clean and check them. When i had finished the job I took the car for a test drive and everything was fine. Set of for Bristol at 5 in the morning and firstly I noticed that fuel consumption was slightly higher, ok its probably me driving. Whilst on the M6 driving at around 75-80 the car coughed and went into limp mode, when I increased the power at almost exactly the same point a rasping / sucking type noise could be heard from the drivers side. When daylight came the rasping noise was accompanied by black smoke from the exhaust.

 

Because of the amount of work I had done I carried my full tool kit + my vag-com. Last night run vag-com and 2 codes were present.

 

1. 17552 MAF short or open circuit.

2. 17964 Charge Pressure Control: Negative Deviation-intermittent"

 

Everything upstairs in the engine was fine, searching the internet revealed many causes all looking expensive.

 

Ok back to basics, the car had worked fine before I fiddled (my wife