I have a 2002 1.8t,
threw the codes
p0638 throttle actuator control r/p bank 1
p02221 throttle pedal position switch b circuit range/performance
The car's idle keeps revving high and falling and stalls randomly. At higher rpm's the car seems to run fine and not show any symptoms, but at idle it fails. The exhaust also sounds much different, almost like a diesel, and the engine shakes a lot, and sounds a lot like misfiring? I am pretty sure the car is running rich because i can hear backfire in the exhaust when i let go of the gas. This problem is intermitent and comes and goes, but when it does it leaves me stranded! I recently replaced: the coil packs, maf, sprak plugs, fuel pump, fpr, and cleaned the pcv breather valve (new one coming in the mail) and the throttle body.
Do the codes thrown by the engine mean that my throttle body is bad? or is it an electrical problem with my pedal assembly? Any input is appreciated, i do not have access to vag-com... are these symptoms that i need a Throttle Body Alignment?
Thanks, ben :/
here is a link to the video: http://qik.ly/Qv9PN1aktdDCAp8Tr69gH4