Thanks for the donation.
When the odometer and speedometer both stops working, it should be the speed sesnor that is faulty. Get it replaced.
When the speed sensor is not working, the trans would shift irregularly as the speed signal is not received by the PCM so it does not when to accurately shift.
As to the surging when engine has warmed up, the following things could cause it.
1. Vacumn leakage at the throttle body. Check for disconnected or leaking hose.
2 Idling speed set too high.
3. Faulty EACV/IAC or its coolant hoses are clogged. Low coolant level in radiator could also cause this.
4. Faulty MAP.
Is the CHECK engine light showing?
Wednesday, July 16th, 2008 AT 10:51 AM