2017 has not been a great year so far for Barney (PB engine code GTi)
Latest on the list is a high idle.
So, after completing sub frame change I have an issue where the car now idles for the first 5-10 seconds at just under 1k rpm (good), but then gradually rises to 2k and stays there till i have driven for 10 minutes or so and then it is back to 1.7k.
Only thing that I may have done is knocked a cable perhaps(?) as nothing else has changed. However, thinking about it I did attach one of the vac pipe back into the airbox (filter housing) so it loops out and back in and now I am not convinced this is right.
Can someone post a pic of the vac pipes around their airbox?
Is there a check list to go through to check before I start trying to adjust the idle control?