Jim Posted January 5, 2004 Report Posted January 5, 2004 Today on my trip home from work (33 miles), I noticed some strange goings on with the temperature on the engine. After quite a few miles, I noticed the temperature was sitting at 50. Then the temperature decided to pop up to 90 - this happened very quickly - with a second or two. It stayed at 90 for a while then suddenly dropped back to 50. Again it stayed at 50 for quite a few miles, before heading quicky back to 90. This really puzzled me, so I played about with the cabin heater to see if this was possibly sucking all the heat from the engine, but the drops were so sudden, I cannot believe this was the case. Any ideas, or has the alcohol in the antifreeze went to my temperature sensor's head? :rolleyes: :unsure: Quote
gazza007 Posted January 5, 2004 Report Posted January 5, 2004 I had this trouble last year, went the other way to 0, took 2 visits to dealer to fix.New sender unit required to fix problem. :rolleyes: Quote
Jim Posted January 5, 2004 Author Report Posted January 5, 2004 I've only just got the car, so will query the dealer about this one. How much did it cost for the unit? Quote
Ivor_E_Tower Posted January 5, 2004 Report Posted January 5, 2004 Definitely a problem. Without wishing to go into Boyle's law again, the coolant temperature cannot suddenly rise or fall by 40 degrees in a few seconds. All movements of the temperature gauge should be gradual. Quote
Guest SA Intruder Posted January 5, 2004 Report Posted January 5, 2004 New sender required - or wiring to it loose - could be instrument or flexi circuit, but less likely. Quote
gazza007 Posted January 5, 2004 Report Posted January 5, 2004 Done Under Warranty,Dealer has had a reputation for not giving me invoices for warranty work despite my requests.When Air-Con compressor was changes I asked them for the invoice and they put a felt tip through the cost. When I had a look under light could see Quote
Jim Posted January 5, 2004 Author Report Posted January 5, 2004 Where do I find the sender to check the wiring - sorry, I have no idea where to look, so the more detail the better. Thanks,Jim Quote
Guest ianock Posted January 6, 2004 Report Posted January 6, 2004 Take it back to where you got it & let them fix it? How are you going to check the wiring(visually I hope)put a multimeter(on resistance)& you'll blow the PCM instantly if it's still connected as the gauge is controlled by the PCM.For correct diagnosis you need to use Datalogger,unlessyou have that all you can do is visually check it.You'll find it connected on a coolant hose on right side of engine,on diesel engines it's at front of engine(look for the 2 wires coloured blue & other brown). Good luck :rolleyes: Quote
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