Back after a long
Join Date: Oct 2011
Location: United Kingdom
No low down turbo, usual suspects checked
Hello there guys and gals, been a while, and the beast is actually back on the road after a year of what I can only describe as a harsh lesson in owning a high millage Alfa.
I now have no low down power (and not too much further up either) Map sensor replaced, MAF sensor replaced and checked by unplugging it. I have whittled it down to the Actuator on the turbo.
When the car is powered up it moves, but only a very small amount, so obviously not moving the veins inside the turbo. The arm moves freely and there is a vacuum going both into the solenoid and out of it. I have bypassed this though and it does seem to move a little more, but not much. I have checked the small hoses for leaks, and also the upper and lower turbo hoses. My only conclusion is that maybe there is not enough vacuum going to the actuator??? What controls this, and where does it come from, I have followed the little hose back over the top of the engine to the back and can kind of see where it goes to, could it be a leak back here or the vacuum "creator" that could be faulty, also what controls the vacuum creator, is there a sensor directly linked to it, or is it just meant to be a constant vacuum pressure that is simply controlled by the solenoid above the radiator??
A little back ground story, when this first happened I for some un-explainable reason blew into the small hoses and the problem sorted itself, then when all working fine, when accelerating, I would hit about 3000 rpm and it would suddenly loose power for a split second, then carry on as normal, it gradually got worse until I find my self in the situation I am now!!
Any help or advice would be gratefully appreciated, it really really would!