Steveenduro Posted November 14, 2005 Report Posted November 14, 2005 Hi all. I've seen a few posts related to temp problems, but I have a few problems which may (or may not) be related.The temp gauge fluctuates between about 60 and 90 degrees on warm up, but usually settles down when hot. Also, occasionally when starting a warm (not fully hot) engine, I get a horrible second or so of high revs, which quickly dies down. The engine occasionally ticks over too high also (approx 1200 rpm).I think it must be related to the temp sender on the top hose. Does this sender supply info to the engine management system? BTW great forum - Saved me a fortune on garage costs with the "seized wiper" problem. Many thanks to the regular contributors. Right, enough of the creeping! Any view on the above greatly appreciated. SteveC 115 Tdi Dec 2000 Quote
graemer Posted November 14, 2005 Report Posted November 14, 2005 Mine does exactly the same - been doing it for a while. I have also noticed a drop in performance, not sure if this is related - have read the threads on the MAF but disconnecting makes it worse so assume MAF is OK? Am wondering if performance loss is related to the turbo (some interesting threads on vacuum control etc). Sometimes almost seems OK but then when accelerate up hill it is definately not right. Quote
graemer Posted November 15, 2005 Report Posted November 15, 2005 it has gone very quiet out there - is there really no one else who has experienced this high rev starting problem? Quote
Steveenduro Posted November 15, 2005 Author Report Posted November 15, 2005 I'v just about convinced myself that it must be the temp sender. With a hot engine I watched the gauge plummet to an indicated 50 deg and the tickover rose by a couple hundred rpm. The ECM must be getting a message that the engine is cold.If I could just find the bleeding sender then I'll replace it. Even the diagram in the TIS does not help me. Am I going mad or is it well hidden? Quote
jimjamjo Posted November 15, 2005 Report Posted November 15, 2005 Someone posted a link to a 30 page VW pdf all about the diesel engine. I can't find the link so I've put the pdf it on a website: http://www.cheaty.co.uk/tdi-tech.pdf Quote
jimjamjo Posted November 15, 2005 Report Posted November 15, 2005 Step 3 page 30 mentions "high idling speed mode" Quote
jimjamjo Posted November 15, 2005 Report Posted November 15, 2005 The coolant temperature sender "G62" plugs into the side of the coolant pipe which joins the front of the cylinder head (under the third injector). Quote
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