Chrysler Repair: erratic idleing and shifting, air intake hose, aamco transmissions

Question
I have a 1994 Chrysler Town&Country w/ a 3.8L V-6 All Wheel Drive. This van is like dr.Jekel & MS. Hyde. There is an idoling issue. One min. the van idol and runs/drives just fine and the next min. it will act as if i dropped the shifter in low gear or turned over drive on. If you stop and place the van in parkthe RPM will diol really high like in the 3000 range and you can hear the vans idol go up and down like you are pressing the gas. If you put the van in drive or reverse while its haveing its idoling issue it will SLAM into gear and that can no way be good for the transmission. I had a $1000.00 brand new computer put in the van from chrysler and still no fix. I have had the vans tranny. looked at by chrysler techs and AAMCO transmissions and they find nothing and of course the van would not act up for them. I dont belive its the transmission becouse when its running good the tranny. shifts great and on time with no issues. PLEASE PLEASE HELP! Its a wonderful van and i dont want to get rid of it. there are no computer codes . 55 is all it shows!

Answer
Hi Raymond,
I would remove the fat air intake hose to the engine where you will find the throttle body. Note the cable from the gas pedal that when pressed will open a flat plate in the throat of the body. Use some solvent on a q-tip or similar applicator to clean the throat and both sides of the throttle plate. Also clean the the little hole on the side of the throat which is the idle air intake pathway. It may be also that the automatic idle control motor is sticky. That is an electrically operated rod that controls the amount of air that passed thru the side air hole. That little "motor" is held by screws into the outside of the throat and has a plug-in connector. If you remove the connector (lift tab gently to release) and the screws then the motor will come out and you can clean its tip and hole into which it is inserted, again using a q-tip. The connector has 4 wires (gray/red, yellow/black,brown/white, violet black) to identify the idle motor.
Roland