Intermittennt idle mode - Ford Powerstroke Diesel Forum
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Old 11-12-2013, 05:06 AM
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Intermittent idle mode

So over the past month or two, the truck has been entering into idle mode while under acceleration. When it happens, the MIL light comes on, truck goes into idle (not shutting down) and no response from accelerator. After 3-4 seconds, I get throttle response and truck is back to normal.

Searching points to a possible Idle Validation Switch (IVS) issue. So I hooked up Autoenginuity and monitored the IVS as well as the Accelerator Pedal Position (APP). I was hoping to see the IVS signal change state during periods of acceleration. This morning, on the highway, symptom occurred and I did NOT see the IVS signal change while at partial throttle.

Where do I look next?

Thanks.

Last edited by LOOSEWHEEL; 02-06-2014 at 12:35 PM.
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Old 02-06-2014, 11:22 AM
Compression Ignition Addict
 

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This issue is getting worse. Replaced the accelerator pedal assembly ruling out the IVS. Put in a new CPS as well. Problem is bad for the first 15 minutes then it stops. Today, it probably went to idle 20-25 times in the first 5 minutes then gradually tapered to where it wouldn't happen again. Releasing the throttle to zero 'resets' it until it falls flat to idle and the dash lights up.

Any ideas fellas?
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