mk2 reving

my mk2 golf seems to be reving up and down a little bit on idle does anyone know what may be causing this? thanks

Possibly the ISV unit, cylinder shaped thing near the rocker cover

ok thanks mate ill see wat i can do

jack wrote:

ok thanks mate ill see wat i can do

First try removing it and cleaning it out. If not just replace it with another one.

This is what the ISV looks like btw:



let us know how you get on

vacuum leak. check all the pipes from the throttle body to the air filters etc.

better still go to a garge and get some new stuff and replace.


but defo try the isv first, use carb cleaner to clean it out

ok thanks guys ill give it ago much appreciated

Mine did that. Tap the USV with the handle of a screwdriver. Thats what I did, was fine after.

wats a usv cause this is gettin on my nerves now