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Car Forum / Volkswagen / Water Cooled Volkswagen Cars / August 2006Flat acceleration MKIII TDI
Driving home tonight and the first 20 miles everytuing is normal, then leaving a 50mph limit put my foot down and the acceleration is flat, same thing out of a 40mph limit and it stayed flat until I got home. Even in 3rd gear with foot to the floor the acceleration was flat and it didn't seem to want to get above 2,000rpm. No warning lights, or odd noises. Left it for 30 minutes then took it out for a run and the acceleration is back to normal. Is this indicative of something failing? Any ideas what might have caused this? Car is Golf MKIII TDI 90bhp, P plate, 125,000miles, FSH. Thanks for any advice. Pete > Driving home tonight and the first 20 miles everytuing is normal, then > leaving a 50mph limit put my foot down and the acceleration is flat, same [quoted text clipped - 15 lines] > > Pete Pete Sounds like the Mass Air Flow sensor. Had a similar thing happen to me, replaced it, and things were *almost* back to normal. Never got the same 'turbo kick' back that I used to have :-( M. >> Driving home tonight and the first 20 miles everytuing is normal, then >> leaving a 50mph limit put my foot down and the acceleration is flat, same [quoted text clipped - 26 lines] > > M. Similar problem on a Passat tdi turned out to be air thrust sensor about the size of a temperature sensor fitted into the inlet ducting before the MAF >> Driving home tonight and the first 20 miles everytuing is normal, then >> leaving a 50mph limit put my foot down and the acceleration is flat, same [quoted text clipped - 26 lines] > > M. It does sound like a MAF fault or the connection to it failing, but could be other things too. Check the MAF connection (on the air inlet trunking), and all the vacuum hoses you can find, especially from the control valves on the bulkhead, and around the turbo wastegate. Do you know anyone with VAG-COM or another diag tool to read any fault codes? Interestingly I had an Ibiza with the same TDI90 engine that did exactly the same when about 6 months old, and never did it again :-/ On 29-Aug-06 17:33:01, Pete said >Driving home tonight and the first 20 miles everytuing is normal, then >leaving a 50mph limit put my foot down and the acceleration is flat, same >thing out of a 40mph limit and it stayed flat until I got home. Even in 3rd >gear with foot to the floor the acceleration was flat and it didn't seem to >want to get above 2,000rpm. No warning lights, or odd noises. >Left it for 30 minutes then took it out for a run and the acceleration is >back to normal. >Is this indicative of something failing? Any ideas what might have caused >this? >Car is Golf MKIII TDI 90bhp, P plate, 125,000miles, FSH. I don't know much, but if it were me I'd take the battery leads off overnight and let the computer reset itself, as it might have got confused. Then I'd hope that it didn't happen again :) - but you're sure to get some better informed advice than that. All the best, Angus Manwaring. (for e-mail remove ANTISPEM) I need your memories for the Amiga Games Database: A collection of Amiga Game reviews by Amiga players http://www.angusm.demon.co.uk/AGDB/AGDB.html > Driving home tonight and the first 20 miles everytuing is normal, then > leaving a 50mph limit put my foot down and the acceleration is flat, same > thing out of a 40mph limit and it stayed flat until I got home. Even in 3rd > gear with foot to the floor the acceleration was flat and it didn't seem to > want to get above 2,000rpm. No warning lights, or odd noises. Thanks to everyone for you advice and comments. It's behaved itself for the last two days so I'm going to leave it and see if it what happens. Cheers Pete |
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