Truck loses power at higher rpms
12-23-2009, 04:35 PM
#1
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Truck loses power at higher rpms
My neighbor's '04.5 loses power and cuts out at higher rpms (sounds like >2000rpm). No mods. Fuel filter replaced, WIF drained. Says drain petcock sometimes "inhales air" (pulls vacuum) when cracked open. Has the in-tank lift pump, but no fuel pressure gauge. Any ideas? 
12-24-2009, 01:21 PM
#3
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Location: In Oroville, Ca., same house for past 46 yrs!
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yep, gotta have that fuel pressure number taken between the filter and the inj pump. Without knowing what kinda pressure the inj pumps is seeing you might be getting 10-12 psi when it's idling but when the fuel requirement of full throttle/load or high rpm under load it's just a question.
A F.P. gauge should be the first thing people put on these trucks when they buy them. Shoooot, it shoud be standard equipt.
A F.P. gauge should be the first thing people put on these trucks when they buy them. Shoooot, it shoud be standard equipt.
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jschintgen
HELP!
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12-31-2009 11:17 PM