Hi - Please excuse this intrusion from a Saab owner - I've got the 1.9 16V diesel in my '06 Saab 9-3, which is the same Fiat (?) GM unit that many here have.
Recently cleaned the EGR (thanks to the excellent sticky on this forum), and also the MAP sensor (toothbrush + carb cleaner). EGR seems fine - starting OK, and engine warning light went out. The car runs mostly OK, but now have a slight judder or pulsing, when the engine is under load - e.g. slight hill, or accelerating out of a roundabout. This seems to start after 3 or 4 seconds under load, and lasts until the car reaches a steady speed. Engine speed doesn't seem to matter too much - starts at around 1500 rpm, but also evident at higher revs (2 - 2500 rpm). Rev count seems stable (i.e. not climbing/falling) when it is happening, but there is some additional noise. Hoofing it seems to stop it happening (not really a solution, well, not all the time...).
Long motorway run today - hoping it was still settling down/burning-out crud after unsticking the EGR, but still the same.
Wondering if I've damaged the MAP sensor when cleaning it - it was solid with carbon - like a small piece of coal. Can anyone advise if this would give the symptoms I'm seeing? Any other suggestions welcomed...
Thanks in advance/paul