Sounds like you may have wet the TPS (Throttle Position Sensor).
When this sensor has gotten wet.... the computer is confused as to the position of the throttle plate.
With the vehicle and ignition OFF..... remove the connector that attaches to the TPS. The TPS is screwed to the throttlebody with 2 screws and is usually black plastic.
May need to use some compressed air to dry out the TPS and connector.
DO NOT concentrate the compressed air directly on the TPS... Just blow across it....
Another component that can cause this problem is the IAC (Idle Air Controller) sometimes also known as the IAS (Idle Air Solenoid).
Sometimes the solenoid plunger sticks and this will cause the ilde to be irratic... surging up and down. Remove the connector and the two screws and clean the beveled edge of the plunger with throttlebody cleaner and spray some in the hole that you remove the IAC from. Carbon build up will cause the air flowing thru not to be metered properly; causing the ilde problem.
2000 Ranger 4.0L 4dr 5 spd 4x4 w/ ORP
Modifications: 265/75R16 BFG AT KO, Detroit TruTrac l/s, K&N FIPK, 66mm BBK TB, Gibson 2.5" catback exhaust, BAMA SCT Tuner, Underdog Performance 25% underdrive pulley, James Duff Traction Bars, Taylor 8mm sparkplug wires
Future Mods: JBA Headers
Last edited by OffRoad 4x4; 10-08-2005 at 08:45 PM.