bpenn1980
SILVER Star
Solved: Moisture in TPS
Hi all,
I did some searching and leg work on this today without success, so a quick post to see if anyone has thoughts while I keep working the problem.
Background: Recently completed ~1,000 mile trip into Mexico. Solid CEL on last few hundred miles back into US with maybe slightly rough idle, but no drivability issues. Pulled codes 26 and 71 today. I don't think 71 is my primary concern right now.
I planned to fill up with "clean" premium chevron today and run a tank to see if my codes resolved. I wont get that opportunity since on my drive back home from the gas station (filled with new premium) I had the issue shown in the video below which kills the drivability of the truck. See video, but basically anytime I put too much load on the engine (moving or parked), the RPM will cut out and ramp back up, cut out, ramp back up, etc
New video by Brad Pennington - https://photos.app.goo.gl/S8rPRchfCX3o3BicA - from drive when I first noticed it happening coming back from gas station
New video by Brad Pennington - https://photos.app.goo.gl/qHCKWVynZoomE3AN9 - from driveway after the engine cooled a little (seems to idle fine on start up, but after inducing the problem, the idle goes to sh!t)
I got back home, unplugged O2 sensors. Resistance was in spec, though sensors are from ~2007. Outer sensor had a little corrosion on one pin, but not bad. I unplugged the ECT (engine coolant temp) sensor and got resistance readings from the sensor that seemed in line with the FSM based on how hot the intake/block felt.
That is where I left things today.
I did a fair amount of work in advance of the trip and things were running very smoothly until we returned home. We did get into fair amount of water, mud, sand, salt exposure during the trip, so I was hoping the O2 sensors were soggy, but no such luck.
Thanks for chiming in if you have any ideas.
Hi all,
I did some searching and leg work on this today without success, so a quick post to see if anyone has thoughts while I keep working the problem.
Background: Recently completed ~1,000 mile trip into Mexico. Solid CEL on last few hundred miles back into US with maybe slightly rough idle, but no drivability issues. Pulled codes 26 and 71 today. I don't think 71 is my primary concern right now.
I planned to fill up with "clean" premium chevron today and run a tank to see if my codes resolved. I wont get that opportunity since on my drive back home from the gas station (filled with new premium) I had the issue shown in the video below which kills the drivability of the truck. See video, but basically anytime I put too much load on the engine (moving or parked), the RPM will cut out and ramp back up, cut out, ramp back up, etc
New video by Brad Pennington - https://photos.app.goo.gl/S8rPRchfCX3o3BicA - from drive when I first noticed it happening coming back from gas station
New video by Brad Pennington - https://photos.app.goo.gl/qHCKWVynZoomE3AN9 - from driveway after the engine cooled a little (seems to idle fine on start up, but after inducing the problem, the idle goes to sh!t)
I got back home, unplugged O2 sensors. Resistance was in spec, though sensors are from ~2007. Outer sensor had a little corrosion on one pin, but not bad. I unplugged the ECT (engine coolant temp) sensor and got resistance readings from the sensor that seemed in line with the FSM based on how hot the intake/block felt.
That is where I left things today.
I did a fair amount of work in advance of the trip and things were running very smoothly until we returned home. We did get into fair amount of water, mud, sand, salt exposure during the trip, so I was hoping the O2 sensors were soggy, but no such luck.
Thanks for chiming in if you have any ideas.
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