I have used the 027 coil in a beetle with with points and the coil was getting hot. It was solved by using the 039 coil (Bosch grey).
I did a coil on plug conversion on my race car using just stock truck coils. They fire the methanol without issue even when it's rich enough to milk the oil
I'd also pull the spark plug and check the gap. They're iridium plugs if you have a North American model, so they should be good for 100k miles, but worn spark plugs will kill ignition coils.
When I bought my 2008 VW Rabbit 2.5, it had 142K miles on it and I wanted to be sure I did a complete tune-up, not knowing its history. I bought the whole OEM unit which came with cover, gasket, bolts and PCV valve at a low price from Amazon. When I pulled the coils to replace the plugs, I saw that they were covered in oil from the leaking center section of the gasket, so I bought NGK coils to go with the NGK iridium plugs. When I pulled the plugs, I saw the tops were also covered in oil but the working end of the plugs were fine (Bosch plugs and the original coils). Replacing everything was easy and I torqued everything correctly. No more leaks and the car performs wonderfully on 87 octane.
Had thrown some 2 years ago and still running clean as ever
I have 75K on my CC Sport with APR Stage1+ Tune. I recently changed my plugs and put APR coils in not sure if got any real power but the car feels so much better. At $27 a coil why not use APR?
I purchased the MSD coil upgrade kit, swapped out the coil pack, new spark plugs / wires, fresh oil / filter. Fired her up and she purred like a kitten.
I ran a Blaster 2 on my old car for a bit. Idle was a little smoother, but it was probably because the coil on it was crap. No real performance gains expected.
After only using the NGK coils for 2 days and when I went to switch them they were fried !!! Complete gone
VW makes bad ignition coils, period. Bad design, bad reliability, bad everything. They actually came out in pieces and were siezed into the head on some cylinders. There was several inches of calcification and junk from water going down into the holes (no engine cover for 123,000 miles). I had to blow out the plug holes with air compressor, after I vacuumed the inches of calcium dust out, then still after I removed the plugs found rust under the crush washer they seat on. It wasn't fun and I had to polish the holes up to hopefully stop that disgusting build up. It was BAAAAAD looking but it ran fine with only a single misfire up to almost 130k.
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