I'm at my wits end on this one. I have a 2003 S10 zr5 with the Vortec
4.3l that for about 3 months now has been hesitating, stalling and has had an extreme loss of power. Sometimes I fear for my life when leaving an intersection and it decides to loose all power. The truck can move, I can get it to 95+ mph but it just seems to not have any torque. Leaving a light from a dead stop, I can put the peddle to the floor and the truck will struggle to get to speed and eventually we can get down the road.I eventually got an error code "P0327 Knock Sensor 1 Circuit Low Input Bank 1 or Sensor 1". After fighting with the dealership they finally replaced the sensor at a discount to me, the truck then ran great for about 3 days. After 3 days the truck started back in with hesitating and stalling and the check engine light was back on with the same code.
Autozone's pocket diagnosis book says to first check or replace the sensor, then check fuel pressure and finally check for an internal engine condition that would cause knocking.
I don't believe the engine is knocking, at least I don't hear or feel the knocking.
Does anyone have any clues or pointers on this? Has anyone seen this before?