Had a REALLY strange problem the other night. Thankfully, it seems to have sorted itself out.
Set off home from work, and it was really jumpy/kangarooy (technical terms) and wouldn't rev at all... apart from spikes and then dying down again. It would idle perfectly, but wouldn't respond to any right foot action.
So, I got my brand new fault reader out, plugged it in and waited for the cause...
"Open fuel tank ventilation circuit"
Erased it and tried moving off again... still the same problem... no revs.
So, with only living not far from work, I thought I'd try and crawl home... so I set off without any revs, tried building them up, but same problem... erratic revs. So left the accelerator alone for a bit and just crawled along (quiet road) then slowly built the revs up. After about 500 yards, it seemed to be getting better, so I started using a little more revs... and bugger me it sorted itself out. It was running perfect then.
Hasn't done it since.
Got to confess to not having much petrol in the tank (15 miles left) at the time... but wouldn't have thought that would have been the culprit.
Checked the fault code reader and the same code has come up. Strange...
Any ideas at all chaps? (based on a 1.8T Sport)