Originally Posted by pdfbt40
As its a Ford approved supply, it could be that the EML is disabled for all the engine management functions handled by the Pectel T2 supplied by Mountune. Most individuals fitting a separate ECU usually remove the bulb. The ignition on is only a bulb check driven by the cluster microprocessor, not a PCM check.
I was also treating the other issues as separate, as I said. You hadn't given any information on the boost problem anyway.
Stabilising the idle by giving an air leak (disconnecting an impulse line), is, as I suggested, more an indication of a PCV issue. Increased blowby on a turbo engine does reduce the life of the PCV valve. You've not mentioned checking it or its piping for condition.
You can't 'clean' the TPS. In any case, the PCM only has to have a reading below 20% if its controlling the ICV (rather than the ECU).
Your describing what you think are possible caused of your boost problem, but not actually what the symptoms are. Why do you think its hitting 'the fuel cut' ? What do you think the fuel cut is on the T2 ?
I check functionality of an actuator by simply pressurising it to a bar or so and seeing that it moves.
The boost valve is simply checked by making sure flow is correctly directed through the 3 ports with and without 12v.
My car uses a catch tank for the breathers and had a one way valve from the crankcase breather to the back of the inlet manifold (before catch tank). The valve is still in place now to prevent any possible blow back along this line.
I'm going to change the ICV either today or tomorrow and replace the hosing from compressor to actuator and lektron valve to make sure there are no hidden splits and after checking the old valve with 12v directly from battery, there was no life there but the attachment plug has 1 or 2volts to it when the ignition is on.
The boost issues are in 3rd,4th and 5th gear, about 3000rpm to 4500rpm. If I accelerate harder than about 10% throttle, the car will stutter and shake losing almost all acceleration. Upto this band and after this band it is fine and pulls well. It often makes like a machine gun popping noise and won't accelerate at all instead. It never has a problem in 1st and very occasionally in 2nd does the popping but very rarely.