Petrol Diagnostics: Fiat Punto, 2002, 1.2 16v

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Fiat Punto, 2002, 1.2 16v Archived Message
Posted by Shaun Williams <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1438' width='330' height='300' border=0 style='border:none;'> on January 5, 2008, 10:45 pm
This little blighter was recovered with the obd light on & multi cylinder misfires. Read the dtc's which just logged various misfire codes. When you tried to start it sounds like the ht leads were on wrong but they were on right. Done the obvious thing & changed the coil. Exactly the same, Changed the spark plugs, The same again. put a scope on the coil inputs, All over the place so I suspect an ecu output fault. A new ecu needs main dealer coding so I remove the coil & scope test the ecu coil outputs. Perfect waveforms. After some head scratching I figured it out. The ecu is mounted on top the engine about 20cms away from the coil. The ht leads insulation had broken down, all four at once and caused some interferance within the ecu. A new set of leads & she was purring like a cat. That was close

Message Thread:

Fiat Punto, 2002, 1.2 16v - Shaun Williams January 5, 2008, 10:45 pm
Re: Fiat Punto, 2002, 1.2 16v - Matt Elliott January 6, 2008, 1:02 am
Re: Fiat Punto, 2002, 1.2 16v - Tony Sefton January 6, 2008, 11:14 am
Re: Fiat Punto, 2002, 1.2 16v - Matt Elliott January 6, 2008, 11:25 am
Re: Fiat Punto, 2002, 1.2 16v - Roger Davies UKAT2726 October 25, 2008, 6:02 pm
Re: Fiat Punto, 2002, 1.2 16v - Tony Sefton October 26, 2008, 12:41 pm
Re: Fiat Punto, 2002, 1.2 16v - Shaun Williams January 7, 2008, 8:27 pm