engine revs without any input

[pumpaction]

hi to all,
i would appreciate any feedback on a glitch in my 2010 s3 sportback which occured yesterday.
waiting to pick up some passengers and engine idling normally...then revs increased to aprox 1500 for a few seconds and dropped back....afew seconds later same thing..increased and dropped back.
this continued until i picked up passengers and drove home,with no further incidences of this happening.
everything now seems normal.
it will be a week or so until i can get the car scanned so i was wondering if anybody has any ideas on the cause.
car mileage is 52k with stage 1 remap and dv+ fitted.no lights showing and seems healthy in all other respects,
any help or advice appreciated.

 

[ch1z64]

I would think you are sucking in air from somewhere which in turn is making car revs jump as this did happen to mine and my fix was check PCV + plus any hoses run from / too are tight as hose on pcv has a small O'ring which has to be seated correctly ( maybe eroded over time. Check Dip stick is seat correctly again check O'ring is there as Orange one degrades quickly ( replace with yellow or after market ) .

 

[Daveyonthemove]

As above. PCV is prime suspect, but check everything else listed above and you should find the culprit.

 

[pumpaction]

thanks...dipstick has been replaced with the new(yellow)version.
will inspect the pcv and hoses as soon as it stops raining.

 

[ch1z64]

thanks...dipstick has been replaced with the new(yellow)version.
will inspect the pcv and hoses as soon as it stops raining.

What you a fair weather person please dontd tell me you play golf too

 

[Dave-v-v]

Do you have the part number for the dipstick.

 

[pumpaction]

sorry,didnt retain part no....but it is the latest version and is definitly more yellow than the original...purchased from
tps if i remember.