It's a 1500 5.3 all stock. I put the old plug wires back on this afternoon
and got the same results. Your guesses sound progressively less expensive,
an O2 sensor would thrill me.
Would a bad injector cause the random misfires? Wouldn't a code come up for
any of those issues?
It does still have the original exhaust system, I've never had one last this
long actually. Is there an inexpensive way to determine if it's the Cat?
Thanks for your input, you guys are great!
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