Hi all, I have a 1.8 gti cabriolet, 1991 and am having a problem with it. On start up it starts straight away, but after a minute or so the car starts revving up and down. It idles steady after about 5 mins no problems. It does not cut out at all but it a bit annoying revs racing up and down. Is there a way I can check things eg WUR, etc that they are ok. Any help with be much appreciated and thanks again in advance.
can go over all the basic checks here, ignore the fancy 16v stuff. yours will have cold throttle enrichment system so open throttle switch but no isv controller so no closed throttle switch: https://clubgti.com/forums/index.ph...air-and-tune-your-mk2-corrado-1-8-16v.195423/ check carefully for air leaks, lots of pipes dotted around an old kjet which can split
