Engine Mechanical problem
2001 Chevy Impala 6 cyl Front Wheel Drive Automatic 156352 miles
I have a 2001 Chevy Impala with a 3.4L. When I start the car, it will idle fine however when I go to take off with it, it wants to pick up speed and idle high (will go as fast as 45MPH without touching the gas!). When in park after it wants to go its own speed/rpm, it will still idle high. I have changed the plugs, wires, coil packs, the sensor under the packs, throt. Positioning sensor, fuel filter (fuel pressure is perfect), o2 sensors. What else can it be? I am trying to advoid the dealer, as I can not afford to pay them and they won't help me a bit! Thanks for your help!