I have a 2006 S 4WD and having a problem where my ignition coil on the #1 cylinder keeps burning out, right near where the wire plugs into the coil there's a little square area that gets blown out to the point the plastic even splits in that little square pattern. This has happened 4 times now, have swapped 2 used coils I had as spares and 2 brand new coils into #1 and every time within 30 miles the coil burns out and I get the blinking SES light for #1 cylinder misfire. The X has just under 200k miles, but barely 700 miles ago the motor threw a rod bearing and shot a rod through the oil pan. Pulled that one out and replaced with a 4.0 that had 107k miles. When my mechanic first did the swap, she ran for about 3 weeks just fine with no issues whatsoever, even took a 500 mile trip to visit some friends with no issues even then. The week after I get back from that trip, she wants to burn the #1 coil every 20-30 miles now.
It's always happened in the middle of trips into town(work or errands about 10 miles from home) and of course #1 being almost impossible to take out without removing the intake I've had to drive it back home those 4 times, a few miles each trip. Well consequently I burned out my passenger side cats, they were completely melted so had to spend $400 replacing those the other day, and also the #1 cylinder fuel injector replaced because sometime during this whole ordeal it decided to get stuck wide open. She's parked now even with the 5th coil being put in, I don't want to risk burning up 2 brand new cats.
My mechanic is thinking bad ECM, but wondering if I should start there or look to see if I have a bad ground somewhere or what.
It's always happened in the middle of trips into town(work or errands about 10 miles from home) and of course #1 being almost impossible to take out without removing the intake I've had to drive it back home those 4 times, a few miles each trip. Well consequently I burned out my passenger side cats, they were completely melted so had to spend $400 replacing those the other day, and also the #1 cylinder fuel injector replaced because sometime during this whole ordeal it decided to get stuck wide open. She's parked now even with the 5th coil being put in, I don't want to risk burning up 2 brand new cats.
My mechanic is thinking bad ECM, but wondering if I should start there or look to see if I have a bad ground somewhere or what.