Re: Peugeot 206 Engine HFX (and fix) - A common fault highlighted Archived Message
Posted by Mike Walker on January 10, 2008, 9:20 am, in reply to "Re: Peugeot 206 Engine HFX (and fix)"
Excellent Post , this is indeed a common problem which is often the cause of ECU failures. Any wound component (whether it be an injector an ignition coil an EGR valve , idle-valve etc.) with a SINGLE shorted turn acts , as you correctly state, as a transformer with a short circuit secondary. As it is switched on , this shorted turn absorbs a considerable amount of energy from the switching component , far more than the components in many ECUs are designed to accomodate. This naturally produces ECU failures and breakdowns. It is a regular occurance when these failures occur for mechanics to state they 'have tested the injectors' etc , meaning that they have measured the resistance , which , as you state , means virtually nothing and produces repeat failures because the problem has been missed. A second issue is that , in a number of acses , the short circuit will only occur when the components heats up and the metal expands slightly , this means that the fault only occurs after driving the car for a while and not immediately. Thank you for highlighting this point that testing the resistance of many components is about as close to test driving a car by kicking the tyres. Well Done
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