I bought a new Denso coil to put on cylinder 3 just to eliminate it as a possibility.
I was chasing down a P0352 CEL. I moved the #2 COIL to the #1 cylinder and the CEL followed the coil (P0351). I ordered the first Denso Coil from Amazon ($53), knowing there could be a possibility of a fake/counterfeit. CEL disappeared.
I'd recommend Only the denso coils. I got a denso and that's lasted about a year so far.
Denso coils are good for another 150,000 miles
2016 1.4 T ran like brand new after changing to the APR coils. You could definitely feel the difference.
I ran Apr coils for a little while. Was instantly more stable after I was running rough. I think it’s worth it even without a tune, and it’s more headroom to keep a tune stable as well. I didn’t notice power gains only that the rpm needle was sharper at being steady.
I'm running APR coils with ZFR5E-11 plugs. There was a noticeable smoothness when I fired it up after install.
If you want to aftermarket
DENSO 673-3204 is best
I tried running them with the stock plugs awhile back and ended up with random misfires. Pulled them off and put the stock coils back on…no more misfires.
Please get rid of those APR Ignition Coils and RS7 Spark Plugs. You are most likely encountering the misfiring from those alone.
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