mossy835 Posted September 6, 2016 Report Share Posted September 6, 2016 turn the key and it starts ok,then when you stop it on the key, some times you have to keep turning the key till it starts,its done it about 3 times this week,what do you think it is, Quote Link to comment Share on other sites More sharing options...
ditchman Posted September 7, 2016 Report Share Posted September 7, 2016 sounds like the key moduale...connections are on there way out....... Quote Link to comment Share on other sites More sharing options...
Hamster Posted September 7, 2016 Report Share Posted September 7, 2016 Meganes stopped having turn keys in 2003, ones after this date need a fly wheel sensor (which I wouldn't recognise if it fell on me) if it's an older model it could be the throttle body housing needs a clean, again I wouldn't know where to look Quote Link to comment Share on other sites More sharing options...
Cannon Posted September 7, 2016 Report Share Posted September 7, 2016 When you turn the key does the engine crank over, or does turning the key do nothing at all until the third or so attempt? Quote Link to comment Share on other sites More sharing options...
mossy835 Posted September 7, 2016 Author Report Share Posted September 7, 2016 (edited) Meganes stopped having turn keys in 2003, ones after this date need a fly wheel sensor (which I wouldn't recognise if it fell on me) if it's an older model it could be the throttle body housing needs a clean, again I wouldn't know where to look just took it out and he said it well could be the fly wheel sensor,its a 1998 model.thanks Edited September 7, 2016 by mossy835 Quote Link to comment Share on other sites More sharing options...
mossy835 Posted September 7, 2016 Author Report Share Posted September 7, 2016 When you turn the key does the engine crank over, or does turning the key do nothing at all until the third or so attempt? this Quote Link to comment Share on other sites More sharing options...
Cannon Posted September 7, 2016 Report Share Posted September 7, 2016 this Which one? A bad crankshaft sensor could prevent starting, but the engine would turn over. I'm trying to find out if the fault lies with the ignition circuit, or somewhere else. Quote Link to comment Share on other sites More sharing options...
mossy835 Posted September 7, 2016 Author Report Share Posted September 7, 2016 i took it out the garage tonight, and he said it could be the cranshaft senor,it turns over but wont star for a while. then it will. Quote Link to comment Share on other sites More sharing options...
Cannon Posted September 7, 2016 Report Share Posted September 7, 2016 A faulty crankshaft sensor could cause this issue. If your garage has an oscilloscope, it shouldn't take too long to confirm it. Quote Link to comment Share on other sites More sharing options...
Hector Vector Posted September 9, 2016 Report Share Posted September 9, 2016 Had a very similar issue on a 2001 Scenic years ago (K4M 1.6L petrol). It was the crankshaft position sensor; they pick up small amounts of ferrous particles which in turn degrades the signal generated by the sensor (it's a VRS sensor and sensitive to contamination). This signal is essential to starting because, amongst other things, it is used for injector control. No crank signal = no start. Remove it (easy enough) and gently clean the end of it. You may well find it cures your problem. Quote Link to comment Share on other sites More sharing options...
mossy835 Posted September 9, 2016 Author Report Share Posted September 9, 2016 thanks for that, its booked in the garage on tuesday to have this done. Quote Link to comment Share on other sites More sharing options...
bazzab Posted September 9, 2016 Report Share Posted September 9, 2016 Agreed crank sensor.... two 13mm bolts and a plug simple job to do. Takes 5mins done countless. Quote Link to comment Share on other sites More sharing options...
Tam Posted September 10, 2016 Report Share Posted September 10, 2016 The receiver for chip used to be in interior light & got damp from water ingress - probably fault as above though Quote Link to comment Share on other sites More sharing options...
bazzab Posted September 12, 2016 Report Share Posted September 12, 2016 The receiver for chip used to be in interior light & got damp from water ingress - probably fault as above though Very common... But only the early ones. Was the aerial Base leaking. Quote Link to comment Share on other sites More sharing options...
mossy835 Posted September 14, 2016 Author Report Share Posted September 14, 2016 came back from the garage yesterday, and it was the crank shaft sensor,thanks all.for the in put. Quote Link to comment Share on other sites More sharing options...
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