02 5.9 looses power under load

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Maddmatt1369

Junior Member
Joined
Aug 23, 2025
Posts
8
Reaction score
2
Location
Missouri
Ram Year
2002
Engine
5.9
Truck runs great cold then….. undee load can’t get over 2500 rpm’s . 2 months prior fuel pump went out. Replaced it 2 months good. Ran good then I thought it ran out of gas so I fueled it up same thing thought I picked something up grim bottom of tank changed filters. Same thing changed o2 sensors, same thing, found broken ground fixed it run good for a couple hrs then .,,, keeps throwing codes p0031,p0037, p0132,p0142,p0138 ,p0135,p0171
Does anyone know why with out removing/cleaning/replacing everything in the powertrain??!
What’s the fuel pressure supposed to be??
What’s the short and long term trims supposed to be at ??
I’m posting the specs when it’s running like sh$& .
Please save this truck!!!
 

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