How to test COPs (coil on plugs), '01 F150 w/155K miles misfire??
Waiting for AAA as I write this
Started truck up at lunch, noticed a slight "hiccup", turned off truck, started it back up, idled fine. A few hours later left to drive home, ran fine for 10 minutes, now it's worse.
Shake is worse with load, from what I've been reading it sounds like the COPs give up at about this time frame/mileage???
Any way to test them with a voltmeter or scope?