zim Posted April 20, 2012 Share Posted April 20, 2012 Evening, For the last few months i've had a slight delay (1 second ish) for my engine to switch off after i turn the key off. God knows why ? But seeing as though it still worked perfect i didn't investigate. Today the engine ran fine. This evening, starting the truck up to go and put the winch ropes on for the weekend it refused to start. Plugged the spare ecu in and it worked fine. Plugged the primary ecu in and computer onto it and it didn't read it (i.e. didn't know it was connected to an ecu). Some time ago, maybe 18months or so, i had a similar problem. Sent the ecu to a kind member on here who looked at it but couldn't find a fault - returned it and it's worked since........... So.....???? Answers on a post card ? What could cause the ecu to give me a delay in switching off ? Cheers Gordon Quote Link to comment Share on other sites More sharing options...
RangeyRover Posted April 20, 2012 Share Posted April 20, 2012 Hi Gordon, Is it overun caused by a false feed through the alternator warning light? I certainly had it when I first started with MJ and many others here have sporadically had the same fault. Disconnect the alternator warning light, at the alternator, see if that stops the behaviour. If it does you need a diode in that line to prevent current flowing the wrong way in the circuit and allowing the coils to charge, (or leave the light disconnected) Hope thats it for you, because its an easy fix. RR Quote Link to comment Share on other sites More sharing options...
zim Posted April 21, 2012 Author Share Posted April 21, 2012 Hi, No it's not that. I've had a diode in there since day one. Running the exact same map (i think ) on the spare ecu it switches off instantly. G Quote Link to comment Share on other sites More sharing options...
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