Weird idle and stalling - Ford Powerstroke Diesel Forum
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Old 11-01-2012, 07:49 AM
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Weird idle and stalling

1997 f350 4x4 no mods except "chip" as stated by previous owner.


Truck idles low and will not recover from revving the throttle.
Changed oil, and IPR better but not perfect still stalls when letting off the throttle when warmed up.

Yesterday it loped when I started it up while it was warm, and smoothed out after blipping the throttle. Classic Bad TRS symptom.

My question is what is the relationship between the IPR and TRS? Could the low erratic idle and stalling be due to a bad TRS back feeding to the IPR?
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Old 11-01-2012, 11:25 AM
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Normally the chip would be located on the PCM. You might be able to see it through the hole behind the e-brake assembly. The PCM is normally removed through the engine compartment after unscrewing and flexing the inner plastic fenderwell enough to get it out. If there is indeed a chip, you may want to remove and reseat it. I wouldn't think the TRS would backfeed the IPR. Cheers!
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