When I bought my '99 it had 246k miles on it and was running with a very slight hesitation, but no CEL. With the engine cover off I noticed coil #1 had a big Duralast "D" sticker right on top, so I replaced it with a Denso coil. It ran butter smooth again. The other 7 coils looked to be original.
At 268k miles I was on I70 in western Kansas headed home from Colorado (for the 4th time in a year) and would occasionally hear a thunk noise which I attributed to a suspension bushing that needed replacing. The next day I drove it to work without issue until I took it out for lunch. It ran very rough and the CEL started flashing, I pulled P0303 with the Torque app. Replaced coil #3 with a Denso and it is back to smooth.... and that thunk noise I was hearing hasn't returned in 2 months. I suspect the noise was the start of the coil failure by way of a miss.
I now carry a spare Denso coil in the small cubby in the back
At 268k miles I was on I70 in western Kansas headed home from Colorado (for the 4th time in a year) and would occasionally hear a thunk noise which I attributed to a suspension bushing that needed replacing. The next day I drove it to work without issue until I took it out for lunch. It ran very rough and the CEL started flashing, I pulled P0303 with the Torque app. Replaced coil #3 with a Denso and it is back to smooth.... and that thunk noise I was hearing hasn't returned in 2 months. I suspect the noise was the start of the coil failure by way of a miss.
I now carry a spare Denso coil in the small cubby in the back
