CoxyLaad 0 Posted January 18, 2005 Hi, Its a strange one, when its up to operating temp, it seems to develop a low down part throttle misfire, and the tick over tends to pop and miss. What are the simptoms of the blue temp sensder going tits up? Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 18, 2005 More likely lambda.. but the temp sensor is cheaper! Hook up vagcom and see what it says. Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 18, 2005 I have had Vagcom on it and it didnt bring anything up. would a faulty temp sender register on vagcom? I know a lambda would Quote Share this post Link to post Share on other sites
PhatVR6 0 Posted January 19, 2005 yes it did, it said the idle stabilisation limits had been exceeded. clean out the throttle body, intake boot and ISV with carb cleaner. Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 19, 2005 Yup, idle limits not reached means you've either got a whacking great hole in the inlet manifold or your ISV is buggered. Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 19, 2005 didnt think the isv error would have anything to do with it.... Its weird, it runs great when its cold and warming up. as soon as its up to temp its dead fluffy and missy below 2000rpm. oh and I have warped the front discs.... :roll: Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 19, 2005 If the ISV is stuck OPEN then it'll run shite on part throttle, because there's unmetered air getting into the system. Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 20, 2005 ah - point taken, i will get some carb cleaner today Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 20, 2005 Well it's obviously not stuck closed, cos otherwise it wouldn't idle at all... Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 20, 2005 the odd thing is the idle is as steady as a rock, it just pops and splutters quite a bit Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 20, 2005 If the valve is stuck, then the idle will be steady. It'll just be wrong! Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 20, 2005 Its weird, it runs great when its cold and warming up. as soon as its up to temp its dead fluffy and missy below 2000rpm. oh and I have warped the front discs.... :roll: Join the club! Seems the 24V is afflicted with the same idling and part throttle running probs as the 12V then? Strange though as I've been in a couple of 4Motions and they've been nothing but creamy smooth at all revs. Anyway, yep, as Dr Prat has quite rightly stated, the ISV can affect the way the engine runs, as odd as that may sound. Seems to me they bind closed occasionally (when they should be open) due to the massive heat soak they absorb from the manifold. Actually, yours is 24V yeah? In which case I thought they were OBD2 and didn't use an ISV as per OBD2 Golf VR6s? Or have you amalgamated 12V/24V stuff to get it running? Quote Share this post Link to post Share on other sites
dr_mat 0 Posted January 20, 2005 I'll have you know I'm a well qualified prat, and deserve some respect.. ;) Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 20, 2005 I'll have you know I'm a well qualified prat, and deserve some respect.. ;) :D Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 20, 2005 I am actually talking about my mams VR :D I wish I was in a positin to complain about mine! Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 20, 2005 Ah, in that case it's just general VR6-ness! They're fickle engines! Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 20, 2005 Well I took the ISV off and give it a good clean, mind you its wasnt particularly dirty, put it all back together......no different. I can hear the isv a bit more now though. I thought it was fixed but as soon as it got up to temperature it started popping and missing a beat on tick over. Its got me stumped, if it were an ignition problem then surely it would show up under load? but it goes like a train, and is as smooth as silk, its just when its hot and at low revs, low throttle. See I thought it might have been the ecu engine temp sender becuase its fine when cold, but when it gets up to temp, I think (in my head) that the temp sender is still telling the ecu the engine is cold and therefore it is running on its startup map, and over fuelling, causing popping spluttering and 24mpg running..... Does that make sense? or am I talking out of me big hairy ass? Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 20, 2005 You can try the blue temp sender but I doubt it will make much difference. You'd know when that is dead as it will run like a pig. Still, it's cheap enough to experiment with. It might be your MAF sensor if you're only getting 24mpg. Quote Share this post Link to post Share on other sites
corradovr6sc 0 Posted January 20, 2005 Could be the air intake sensor on the manifold. Quote Share this post Link to post Share on other sites
CoxyLaad 0 Posted January 21, 2005 air intake sensor on the manifold? where is that then?! or are you talking about the maf? Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 21, 2005 He means the sensor next to the servo hose input, next to cylinder 6's inlet runner :D Hadn't thought about that so it's a good call, although VAG-COM and a laptop on the move will confirm if that's working or not. Quote Share this post Link to post Share on other sites
