Misfiring badly
My 04 with 141k miles ran just fine on the way to work. Zero problems. I have always had a steady check engine light on as there is a small crack in the gas tank gasket. has never been a problem.
When I went to drive home, it was about 16 degrees out. The truck started, but ran very rough all the way home. Code reader said misfires on #3, #5, #6 cylinders. Cold or warm the engine does the same thing. Figuring that many going wrong at once, the first logical stop for me was the coil pack. I replaced it, and it has made no difference. Heading out in 10 degrees to pull plugs and check wires, but I suspect something more.
Truck is stock except a K & N breather and a cat-back.
Any ideas would be welcome
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