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2002 Audi A4 Quattro Question: Burning smell from replaced coil; now engine won't start.

 

Question

Bobby B, Eastford, CT, March 03, 2010, 18:13
 Rookie

My engine was misfiring at low rpms. My mechanic replaced all coils and plugs and then detected a burning smell from one of the coils. Now engine won't start. Any idea what's going on and what to do?
Thanks!

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, March 03, 2010, 19:35
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     Master

    Is there any wiring damage? If a coil shorts out it could damage the electronic control unit. We have seen from time to time rodent damage causing the wiring to short out or things not to work. I wonder if something has shorted out during the replacement of the coil, because at least the engine was running prior to coil replacement.

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    Bobby B, March 04, 2010, 04:43
     Rookie

    Thanks very much for your response. Is the electronic control unit a module that can be replaced easily? My mechanic has essentially washed his hands of the problem. He removed all of the new coils and plugs, put the old ones back in and suggested I take it to the dealer. I am supposed to drive to Virginia in the car this weekend so this has become a somewhat urgent problem.

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  • Answer #2

    Visitor, March 05, 2010, 09:55

    HOPE HE DID THE COIL FOR FREE SINCE THE AUDI RECALL WOULD COVER YOUR VEHICLE. I'M PRETTY SURE THERE IS A FUSE IN THE ELECTRONICS BOX FOR THE COILS.

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  • Answer #3

    March 06, 2010, 06:16
     Journeyman

    HOPE HE DID THE COIL FOR FREE SINCE THE AUDI RECALL WOULD COVER YOUR VEHICLE. I'M PRETTY SURE THERE IS A FUSE IN THE ELECTRONICS BOX FOR THE COILS.

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  • Answer #4

    Visitor, March 08, 2010, 05:26

    slap above the instrument cluster with a open palm 2 or 3 times, if that does not work, try it with the key on. Maybe the instrument cluster. If it does not start it is not that. I have gone thru everything & a lot of good machanics being the proble. Good luck!

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