Neil L. 0 Posted January 30, 2010 Got big problem on my 94 VR6(Coilpack type) :( The cars revs are absolutely erratic at low revs - only stabilizing when throttling hard - when waiting at lights the engine will rev itself then die then rev again etc until it finally cuts out! Another symtom is that the car frequently shakes violently at these low revs! The only thing that i've done is to change the plugs - which were quite bad (overfuelling?) - but the symtoms persists! Its so bad that i've decided not to use the car now - its almost undrivable! Done a few search words here - couple of things mentioned! Where do i start??? Quote Share this post Link to post Share on other sites
buttles 0 Posted January 31, 2010 Vag Com will be most peoples first suggestion. It will show up probably 85% of the known symptoms of bad running. Get that checked then report back. If that is clear then there are the known culprits. Neil B Quote Share this post Link to post Share on other sites
andy 0 Posted January 31, 2010 Idle stabilization valve problem, probably needs cleaning. Either that or a foreign body (usually foam) in the surrounding pipework. I've has exactly these symptoms and it was foam in the pipes surrounding the ISV. Could equally be an airleak in the same area. Do a search for ISV cleaning on here, loads of info. Quote Share this post Link to post Share on other sites
Jim 2 Posted January 31, 2010 I'd start with the ISV as well.. it's a common trouble causer for idling problems! Quote Share this post Link to post Share on other sites
millerman 0 Posted January 31, 2010 Got big problem on my 94 VR6(Coilpack type) :( The cars revs are absolutely erratic at low revs - only stabilizing when throttling hard - when waiting at lights the engine will rev itself then die then rev again etc until it finally cuts out! Another symtom is that the car frequently shakes violently at these low revs! The only thing that i've done is to change the plugs - which were quite bad (overfuelling?) - but the symtoms persists! Its so bad that i've decided not to use the car now - its almost undrivable! Done a few search words here - couple of things mentioned! Where do i start??? where are you located lots of people have vagcom on here and are happy to scan your car it takes 2 seconds to scan the engine ecu to find out whats wrong and this way you know what to do to resolve the problem :D if your near farnborough (hampshire) im happy to help ya :D Quote Share this post Link to post Share on other sites
Neil L. 0 Posted February 1, 2010 Im in S Wales unfortunetly but i know someone with VagCom - hes very busy but ill get in touch today to see if he can at least give the car a scan to point me in the right direction! Ill report back my findings. Quote Share this post Link to post Share on other sites
Neil L. 0 Posted February 9, 2010 The MAF seems tobe the culprit - how much for a new one? Could also be the lambda but the bad MAF might be making it not operate correctly! Change MAF first then see how it goes! Quote Share this post Link to post Share on other sites
V-Dubstar 0 Posted February 9, 2010 Glad to see u've nearly got it sorted mate, had this problem on my mk3. Unfortunately can't help u on prices, was just wondering whereabouts in S.Wales ur from? Quote Share this post Link to post Share on other sites
Neil L. 0 Posted February 10, 2010 Im in Swansea. VW part is £110 + VAT! Been told to stay away from cheep "e-Bay" far east part that sell in the region of £60 :nono: Quote Share this post Link to post Share on other sites
Neil L. 0 Posted February 13, 2010 Turns out the wires to the Lambda had corroded and broke - not sure if this alone would have caused the erratic running - to late if so - new MAFs been fitted by mechanic!!! :? Told mechanic to keep the MAF that was replaced - I'll check it when i get the car back! Quote Share this post Link to post Share on other sites
