81412, RE: hesitation Posted by snufalufagus040, Dec-31-69 06:00 PM
Back from the dead...
I'm having all the same issues discussed in here, backfiring, no pull at all under 3k RPMs, hesitation. '99 GS. From what I've read and guessed, I think it's my upstream O2 sensor. I'll know by tomorrow afternoon.
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