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  1. F

    LMM: 2007.5 LMM power issues

    Reset it so it defuels when the water temp hits 240* If "fprv" stands for fuel pressure relieve valve, then there's already a PPE race valve (plug) installed. Where are you guys installing fuel pressure gauges after the lift pump? Looks like I'll be making a trip to see a mechanic soon. No...
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    LMM: 2007.5 LMM power issues

    Low fuel rail pressure. P0087X? I've tried turning the lift pump up and couldn't notice any difference. This was very small amounts (1/8th turn).
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    LMM: 2007.5 LMM power issues

    http://www.youtube.com/watch?v=MHwA040eqbY&feature=c4-overview&list=UU_-P-68tWSzhOgcXJYwAt4g Quality is garbage, but you get the idea. Load: Fuel Pressure: Boost: Coolant Temp: Kind of hard to see but, the first part of the video shows the hill we're about the pull, nothing on the steep...
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    LMM: 2007.5 LMM power issues

    220* is what the mini maxx came preset at, if I remember correctly. I'll watch the fuel pressure a little closer when I make another trip this weekend. Before I put the exhaust/tuner/lift pump on, I was having MAJOR power issues. 6-7 mpg and having trouble holding 65mph with a tiny trailer...
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    LMM: 2007.5 LMM power issues

    It's derating when a "big" (how it seems to the pickup) load is put on the motor. 220* is the defuel setting for hot coolant temp. Apparently that's set too low. Is the engine fan even kicking on then? I'm guessing I need to raise that. Fuel filter is new. Changed it a couple times in the last...
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    LMM: 2007.5 LMM power issues

    Is an EFI live tune going to fix my issue? Probably not. I'd like to get that sorted out first. My ol man's had 1 ton diesels since I was a kid. The load I'm putting on my pickup isn't 1/4 the weight of a tracked skid loader on a heavy duty trailer. The engine load only reading 45% at wide open...
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    LMM: 2007.5 LMM power issues

    If I leave the cruise on (in 6th gear) and begin to pull a hill; it won't down shift itself. It just goes into reduced power mode. So I've been running in 5th without the cruise. The hills I'm talking about are probably only a 5% grade. Nothing like you'd see running down roads on a mountain...
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    LMM: 2007.5 LMM power issues

    2007.5 Chevy 3500, 165k miles 4" down pipe back exhaust (no dpf/cat, has muffler) S&B oil type air box H&S mini maxx tuner Raptor lift pump PPE race valve in fuel rail I tow a 26' enclosed car trailer with roughly 2500lbs inside. So basically just a lot of air drag. Pulling hills it seems to...
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