Car is a 2012 Golf 2.5l. 110,000 Miles. A few weeks ago the car started misfiring/hesitating under acceleration. Threw codes for misfires on all 5 cylinders. I installed new coil packs and spark plugs from ECS tuning and the car will not start. It will crank but not turn over. I put the old misfiring coil packs back in and the car will fire right up, but will still misfire.
I went to a VW dealer and asked them about the problem and they said the newest revision of coil packs (07K905715G) were supposed to supersede the previous versions, but that they had the older models in stock as well. I bought a set of pre-revision coil packs (07K905715F) and installed them in the car and once again, it will crank but won't start. The minute I put the old burned up coil packs in it turns on but continues to misfire.
Any ideas on why either version of genuine VW coil packs will not work in the car, but the old ones start without an issue? I've spoken with two dealerships and two third party companies and nobody seems to have an answer for me. I'm just having a hard time figuring out why simply switching to new coil packs will make or break the car being able to start.
I went to a VW dealer and asked them about the problem and they said the newest revision of coil packs (07K905715G) were supposed to supersede the previous versions, but that they had the older models in stock as well. I bought a set of pre-revision coil packs (07K905715F) and installed them in the car and once again, it will crank but won't start. The minute I put the old burned up coil packs in it turns on but continues to misfire.
Any ideas on why either version of genuine VW coil packs will not work in the car, but the old ones start without an issue? I've spoken with two dealerships and two third party companies and nobody seems to have an answer for me. I'm just having a hard time figuring out why simply switching to new coil packs will make or break the car being able to start.
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