R.p.m. goes up while driving

Sounds like a loose brake caliper mate when driving along no sound so you are obviously not touching the brakes hope this helps

releasing the gas pedal and it gets going again
not very safe

is the engine light on
could be any faulty sensor in this engine diagram

maf clean might help
if a spark issue needs chasing
it could be a fuel problem
maybe bad fuel or blocked fuel filter

Best thing to do is get a vacuum pump and suck each brake line individually keeping an eye on the level in the master cylinder. See if that gets any better. You can borrow one from advanced auto.

transmission. take back and get it fixed under warrenty

yea check sensors and throttle body make sure nothen hitten and linkage free and clear hope helps

go to your nearest service stations and have your suspensions go for GREASING.

That trouble code is faulting the accelerator pedal sensor. The APP sensors are located in a TAC module mounted to the accelerator pedal bracket. There are three individual APP sensors within the TAC module. Three separate signal circuits, low reference circuits, and 5v reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is depressed.

open up ur throttle body u will find alot of carbon . use cab cleaner to clean it then mount it back it will drive smoothly

throttle position sensor most likely...

have you oil pressure sending unit checke/replaced