Just bought this truck HELP!
stolen from explorer forum:
The PCM commands the overdrive solenoid, so sensors such as the TPS, MAF or the VSS could be malfunctioning. Check the overdrive solenoid through the internal wiring harness, and the overdrive band with the adjustment stud. The servo could be bad, and would need to be replaced if it's dried out.
well, there are individual test for the TPS-throttle position sensor, MAF- mass air flow, and VSS- vehicle speed sensor. I'm sure another member here can point you to how to test those. in order to test the overdrive solenoid the tranny pan must be off.
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