dtm8119

Question for this group on something odd I've experienced a few separate times w/ my truck. Did some searching and I couldn't find this scenario...

The latest example was the truck was at operating temp, HVAC & Stop/start switched off, and in park while I was filling up with gas.

As you can see in this video, after awhile the idle RPM's dropped to ~500rpm before it picked back up to normal. It would go through this loop over and over again, about every 30 seconds.


No CEL or drivability issues. ~93k on it.

Bluegrass

A question first, are you force filling after the fill nozzle trips the first time on a full tank?

icecoldak

Filling the tank while engine on?

dtm8119

Filling it until the 1st click, that's all. No additional fuel after that.

dtm8119

Yes that's correct.

FrontRange

Sounds like the cam phasers/solenoids. Let the oil get old (>50%) and see if it gets worse, culminating with it dying at stops.