Engine: D5: Error codes P0102 & P0108 MAF low & MAP high

[cheshired5]

Originally Posted by Chrismmoore

why would the MAP read high as opposed to the MAF reading low.

Your MAP isn't reading high. If anything it's a touch low but you may be a couple of hundred feet above sea level so nothing to worry about.
Your MAP isn't registering much of an increase in pressure though so it's most likely that pressure isn't being generated in the first place.

[savabill]

Have you checked your intercooler for leaks? Is it bowed at the bottom?

[Chrismmoore]

MAP is reading 100 kPa with the ignition off? Is that right

[Chrismmoore]

yip it should read that with ignition off

[cheshired5]

Originally Posted by Chrismmoore

MAP is reading 100 kPa with the ignition off? Is that right

As near as damn it yes so if it's reading 90 kPa at idle, it's losing 10 kPa which shouldn't be happening.
My best guess at the moment is you have an air or vac leak.

[Chrismmoore]

No 99, 100 at idle, on the overrun it may drop to 95, 2000rpm 115. I took off the intercooler hose from the turbo outlet pipe that runs under the engine side to the intercooler. ran the engine with it off. At idle it MAF reads 0. Next check is the pipe from the to that pipe that runs under the engine after the turbo it may be the problem

[cheshired5]

Originally Posted by Chrismmoore

No 99, 100 at idle, on the overrun it may drop to 95, 2000rpm 115.

Ok, well you should easily be getting 140+ kPa when revving stationary and 200+ on the open road at full tilt.
I think you're on the right path and methodically going through every pipe will find your issue.

[Chrismmoore]

Nothing on toward with the pipes, all sound and secure. Very frustrating indeed.
Another thing that i noticed from before the vacuum tube from the turbo solenoid to the turbo vane actuator was missing and the car power never was great and always dodgy pulling out of junctions. I've had the car for two and a half years and it always was like that. I have connected that pipe but this fault doesn't let me use the turbo boost I should be getting with the vanes working.

[cheshired5]

Like I said, you need to verify all the pipework because I think your sensors are fine.
You can further prove the MAF is capable of recognising higher airflow simply by blowing it.

[Chrismmoore]

all pipes are fine, its the way the maf drops to zero and it faults on the overrun/less than 1000rpm which makes me think its the MAF now. It is the most common fault, that is low voltage circuit a and MAF range. P0101 & P0102