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Yamonda

Random misfire ECU Coil drivers?

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Hi all,

I'm having a misfire issue with my G6ET. It has a random misfire sometimes on cyl 1 or 3 (unplugging  coil packs to find dead cylinder). It'll drive and not misfire at all them all of a sudden complete drop a cylinder dead. Does this for a couple seconds upto around a minute then comes good again. Does this pretty much everyday at random times, seems worse when hot but will do it cold as well. I've put a few different coil packs in/swapping them around, and a fresh set of plug in. It came good for a couple days but then back to been weird again. there is a code for Coil circuit A malfunction. I'm starting to think maybe the ECU has failing coil drivers :( Anyone had this issue? 

 

Thanks 

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Sounds like moisture in the coil cover or the coil drivers. 

Could be wiring as well if the engine has ever been out and you've accidentally crushed some cables. 

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