2001 prerunner power problems?

Hi, I have a 2001 prerunner 3.4l and when I get into higher rpm's my truck starts to slow down instead of going faster and it feels like the motor has no power, I have already changed the TPS, cleaned out the throttle body, new coil packs, new MAF, new bank1 sensor 1 and that didn't do anything.

 

did you pull out and spray down the MAF sensor?

 

Clogged cat maybe? If all else fails, I'd test back pressure.

 

yeah, check your fuel trims while youre at it.

 

It's a brand new MAF sensor, how do you check for a clogged cat, also how do you check the fuel trims

 

I think a cat malfunction will cause a CEL under some conditions. As far as fuel trims, I think you need a scanguage for that. Not sure that's something you'll wanna do. Plugs into the OBDII port if I'm not mistaken.