Valves too tight= No start or really bad idle, this will sometimes clear up when you rev the motor do to flex in the valve train. Easy to check for with a vacuum gage, Vacuum gage will jump from 5 to 13 In extremely fast.

Valves too loose= No start or A LOT of noise. The valves should be clapping like me at a Styx concert. Easy to check with a vacuum gage, Vacuum will fall off to almost nothing when you step on the gas.

Another option is a jumped timing chain. Again I going by "Idles great" that something I never heard from someone with valves out of ajustment.

 

what do i need to do if it jumped time, cause it idles at 1,000 rpms n smooth,just when it goes n gear..its really sluggish like no power then sometimes itll be hard to start like as if batteries died

 

Timing chain jumping would mean a new timing chain. The whole front of the motor has to come off. A very rare issue with the 3.4. The main cause for jumping timing chains is runung up to high RPMs the letting off the gas real fast.

Have you tested the Cat yet, cause it still sounds like Cat to me.

 

i did...everything on cat was good...i believe ive jumped time, cause the night it messed up i was running around 95 mph n then it klike jumped then started acting funny

 

compression test on all cylinders would be good to start with

 

lemme ask one more question...Wheres the torque coverter sensor on it

 

Is there a torque converter sensor? Do you mean the torque converter clutch? Neither have a sensor I am aware of. The PCM knows when the clutch is engaged and can compare RPM to MPH and it could know if it was working if the engineers wanter to monitor it.

The torque converter itself is not controled or monitored, it is just a piece of hardware. Even on a 2011 if the torque converter fails there are no warning light the car djust does not go.

 

sitting in the driver seat.

 

could bad fuel pump cause sluggish running