97 Blazer Not Accelerating

I have a 97 blazer, firing at idle or at speeds is perfect. When I floor the gas pedal, the tach jumps to 3000rpm or so but the beast doesn't move as fast. If I let go of the gas pedal she responds better. In fact I have gone past 120kmph. Check engine also flashes but disappears after some time.
Got the codes scanned and read says low voltage at O2 sensor number 3.
Any help will be appreciated
:banghead:

low on tranny fluid? Has it ever been replaced and a new filter?

low on tranny fluid? Has it ever been replaced and a new filter?
I had the same problem and I think they started after a tranny fluid and filter change. Could a fluid change cause the tranny to start slipping? The old fluid wasn't burnt or overheated, at least as far as I could tell...

/Freddy

Sounds like the tranny is slipping. Could be as simple as adding new fluid like stated above.

Alex

OK guys,

Sorry for the late feedback. Got the problem fixed it was a choked fuel filter.
Lucky me.

Thanks to all