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Recent Content by Lone Watie
Attention: TDR Forum Junkies To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.
Every now and then I throw a
P1291 - No Temperature Rise Seen From Intake Air Heaters
like this evening on way to work, only on start up. I usually just reset the CEL and go on my way, but curious if anyone has experience with this code, or what I could check. I'm guessing the intake grid...
I took these numbers from my service manual:
Oil Pressure (min)
Note: CAUTION: If oil pressure is ZERO at curb idle, DO NOT run engine.
At Idle Speed 10 psi
At 2,500 rpm 30 psi
Regulating Valve Opening Pressure 65 psi
They are slightly different from cummins ISB owners manual...