rodders 0 Posted December 17, 2005 Hi, wonder if anyone can help. I own a 1992 g60 and recently the engine revs have become erratic on idle. They drop until it nearly stalls then kicks back in. Under power it starts to chug( the sort of feeling as you are running out of petrol ). Above about 2500 revs the problem seems to dissappear. A mechanic friend has changed the plug leads, rotary arm and dis cap but the problem remains, he has also hooked it up to a electronic diagnostic box but there were no faults found. It has been serviced. Any ideas anyone Quote Share this post Link to post Share on other sites
VR6 0 Posted December 17, 2005 Moving. .....and the search will help you I'm sure. Quote Share this post Link to post Share on other sites
Supercharged 2 Posted December 17, 2005 Welcome to the forum... You need to check things like the ISV, throttle switches.. Blue temp sender and the 1m Vac hose that goes to the ECU Also look for boost/vac leaks... Whereabouts are you as as specialist like G-werks could probably trace the problem quite quickly... Quote Share this post Link to post Share on other sites
vwdubs 0 Posted December 17, 2005 Out of interest is this only when it is cold? Mine has started to do exactly the same thing and it is over fuelling but as soon as engine is up to temperature its fine. Im thinking some sender or fuel control over compensating when its cold Quote Share this post Link to post Share on other sites
CazzaVR 0 Posted December 17, 2005 My first valver started doing this. Turned out to be a split ISV pipe. Have a good look at all the pipe work. Quote Share this post Link to post Share on other sites
catch_twotwo 0 Posted December 17, 2005 Hmm, I have this and hoped that a good service at G-werks would sort it.... but no luck. I thought it might have been my damaged knock sensor so was waiting to get it replaced in January. I'll have to check the ISV pipes tomorrow then.... Along with alot of other things ;) Quote Share this post Link to post Share on other sites
rodders 0 Posted December 18, 2005 It happens when its cold and up to temperature. All the time in other words. Is replacing the ISV a big job? Quote Share this post Link to post Share on other sites
Trig 0 Posted December 18, 2005 No, replacing the pipes or ISV is all pretty easy. Do a search on it. Quote Share this post Link to post Share on other sites
