1993 ford ranger 2WD. 2.3 4 cyl. Engine RPM's Race while truck is in motion. Even with the clutch pushed down. As soon as the truck stops the RPMs return to normal

Submitted by jtmaurer Thu 07/22/2010

Submitted by bfree on Thu, 07/22/2010 - 12:14.

Is the engine revving when the Tachometer is racing up and down?

Check the fuses and/or relays. A loose fuse could cause an intermittent connection and a resultant tachometer fluctuation.

If this trucks has a distributor, check the electrical connectors at the distributor to see if they are making good connections.

Post you results. I'll try to find a wiring diagram which will give me an idea of how the electrical circuit is supposed to work.

Submitted by jtmaurer on Thu, 07/22/2010 - 19:42.

This truck has no tachometer. And it had ciol packs not a distributor. But the PRMs race until the truck is stopped... Then idles fine...

Submitted by Fwayne on Sun, 02/13/2011 - 09:27.

check for vaccum leaks could be (idle air control valve)is your check engine light on

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