All Things Mk5 > How to Guides / Troubleshooting

Revs rising/ dropping at idle

(1/2) > >>

leebes:
Hi All,

Had a strange issue on the drive to work this morning. I do about 10 miles before I have to stop at a junction, so the engine is nice and warm by then. Stopped at said junction, clutch in, foot off the power and the revs went up to approx. 1500-2000rpm and then dropped back to 800-900rpm which is standard tick over for my 07 GTi.

Wasn't sure if I imagined it the first time, but a mile down the road, hit a bit of traffic and there it was again, in neutral, the revs climbing to 2k ish and dropping to idle, then up again and so on.

Had a suspicion it could be an air leak gremlin as I removed the intake a couple of weeks back to fit a short shifter, but all seems tight and sealed there. Have just unplugged the MAF sensor, gave it a quick, careful wipe, plugged it back on and everything appears to be fixed...bizarre!

Any one had a similar issue and know if a bit of dirt or dust in the MAF could have caused it that issue?

Cheers
Lee

Ollieeee:
I had the same issue a while back, it turned out to be the corrugated vacuum pipes off the PCV.

leebes:

--- Quote from: Ollieeee on September 29, 2016, 01:17:50 pm ---I had the same issue a while back, it turned out to be the corrugated vacuum pipes off the PCV.

--- End quote ---

Thanks, so I was on the right lines with an air leak. Will check the PCV over later and see if there's anything obvious

lukemk5gti:

--- Quote from: Ollieeee on September 29, 2016, 01:17:50 pm ---I had the same issue a while back, it turned out to be the corrugated vacuum pipes off the PCV.

--- End quote ---

This thing - http://www.ebay.ie/itm/Breather-Hose-Pipe-Line-Hose-For-Audi-A4-A6-TT-2-0TFSI-VW-Jetta-New-06F103235-/151510344696

leebes:

--- Quote from: lukemk5gti on September 29, 2016, 01:42:28 pm ---
--- Quote from: Ollieeee on September 29, 2016, 01:17:50 pm ---I had the same issue a while back, it turned out to be the corrugated vacuum pipes off the PCV.

--- End quote ---

This thing - http://www.ebay.ie/itm/Breather-Hose-Pipe-Line-Hose-For-Audi-A4-A6-TT-2-0TFSI-VW-Jetta-New-06F103235-/151510344696

--- End quote ---

Thanks Luke  :happy2:

If it is the breather hose then might be a good time to fit a PCV delete?

Navigation

[0] Message Index

[#] Next page