Tried to get the Unichip mapped on Friday gone but the precious problem of the boost cutting is still there.
The boost will cut whenevr it feels like it at anywhere between 10psi and 18psi. It is definitely a boost cut as, if you keep your foot down, it will bounce off that boost e.g. cuts at 10psi and keeps cutting till you back off then it might cut at 18psi and bounce off that (not that I do it often)
It will build and hold boost fine (around 15psi) if I just use part throttle and only cuts under WOT.
The unichip boost module is working fine. The voltages across the MAP sensor is around 3.7 volts all the time so the ECU is only seeing 7-8 psi of boost as its meant to. This was measured directly in the ECU whilst testing.
The other problem I have is the idle speed being high after a period of driving. If you twist the loom a bit it will drop, twist again and it will go up. The guy at John Nobles checke dthis and noticed that, on the laptop whilst mapping, the TPS signal would change as he done this and thinks it is this that is causing the idle (cleaned IACV).
It appears there is a fault with the one of the TPS wires which I would think is the signal wire as no ECU codes are store to indicate the earth or live wires are faulty (no ECU codes at all for ANY faults of any kind e.g. 113).
I have made up a temp wire to go between pin 3 on the TPS and pin 53 of the ECU to see if this helps as I had some spare ECU connectors so it will go in easily enough but I have not fitted it yet till tomorrow.
Question is this then - Will the TPS signal control the boost and induce a boost cut of any kind ??
Just throwing some ideas around to see what ppl think