alfa 156 JTD 'over-boosting' issue
I have a major problem with my first ever purchased Alfa Romeo.
I hope you can shed some light on a major problem that I have.
I bought an Alfa 156 2.4 JTD 150Bhp on 2003 03 plate (pre-face lift) in a private sale, at the end of Nov 09. The second day I went to use it, I noticed diesel leaking from the front of the car, especially when cold. I took it to a local specilaist (45 miles away), who fixed the high pressure fuel pump leak by replacing 2 seals on the pump. The leak was fixed.
However, now whenever I try to accelerate hard on full throttle, the car MCSF ENGINE warning light comes on and the car loses power but is still driveable. This only happens on full throttle, and I can happy drive at 90mph when not accerating hard. The car was put on diagnostic machine by Alfa speciliast and the only code read was P0191 Fuel Pressure Ccontrol. Any idea what it could be? The specialist said that the car was over-boosting.
The alfa specialist has tried to clean some sensors, not sure which ones a few times now and still the problem persists. He said that they normally never have any issues with the diesel engines!!
I actually sold a BMW 320D which was great..but even after all these issues I love the Alfa. But I cannot afford to keep doing 90 miles round trips and the problem not getting fixed. Any ideas or solutions would be greatly appreciated.
One final thing, I think the car might have been re-mapped but not sure. During the test drive (which is what sold the car to me) the car was like a rocket in every gear - way faster than the BMW 320D. Not sure if this is relevant or not, as both myself and previous owner could not say for definite if it had been re-mapped or not.
Thanks for your time and all the best in the New Year.