Quote:
Originally Posted by EJT86
I wouldn’t. I’d replace them as they died. That’s too much money on parts that aren’t really likely to go bad
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I over maintain all my cars, but I do the work so it’s just parts. Spending time on this keeps me out of bars where I would spend more money. On most cars, I would agree with you that coils work or don’t work, but on these cars, the knock sensing works through the plugs so the ignition is more critical. I run as much as 37 degrees advance so I want things working perfectly. I also know that coils actually do weaken over time — I have a couple of modified turbo BMWs that taught me that (original coils fine at low boost but misfire at high boost and new coils stopped the high boost misfire).