Engine Idle Rolls Up and Down on Ford E-350

If engine idle rolls up and down, and diagnosis rules out Idle Air Control (IAC) valve issues and vacuum leaks, the Programmable Speedometer/Odometer Module (PSOM) can be at fault electronically. The instrument cluster will need to be replaced, the PSOM is inside the cluster.

RepairPal Verified
Average mileage: (–)
2 model years affected: 1992, 1993
2 people reported this problem
0 people shared problem details
Related Items:
1991 E350 351 winsor in a motor home chassy need to drop oil pan down to change rod bearing ......
Sludge build up on the throttle plate and/or idle air control valve can cause a poor engine i...
Starts fine and runs great for 10 to 15 minutes. Then it starts running rough and idle goes up...
My '91 ford E-350 Econoline Diesel 7.3 L is starting hard. When engine is cold (not- run-for-o...

Related Content