whats wrong with my truck. - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 05-31-2008, 08:18 PM Thread Starter
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whats wrong with my truck.

well i was towing a jeep on a car hauler to go wheelin and my buddy with a chevy 2500 p/u with a 6.0 gas motor can was hauling the same load. his gas truck can kick my butt easily. my psd was getting barely 10mpg and i had no power in the hills. in the hills the gasser would blow right by me. ive only had this truck for a week and its my first diesel too.

this time i was hauling one jeep, the plan is to haul two jeeps on a double trailer but there is no way this ballless wounder could do it. i have another friend who has a cummins and its wayyyyyyy better than mine.the cummins will **** and get in the hills with two jeeps behing it. it will blow the gas truck away.mine loses speed on small hills. my truck only has 80k on it and runs good unloaded but i still only get 10mpg. where do i start and what to check. i am a certified master mechanic but have NEVER waorked on a diesel before. i have a whole shop at my disposal with a modis scan tool too.

is this completely normal or somthing wrong?

sorry if im an idiot but im real disapointed and could use some advice.

allpro auto & offroad in michigan

2003 f250 7.3
volant air kit
4 inch exhaust
the rest is stock.
4 door,4x4,short bed.
zoodad mod
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post #2 of 18 Old 05-31-2008, 08:42 PM
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Do you have gauges? Are you pushing any boost at all?

Old Truck: 00 F350 XLT DRW: basic first few mods. S&B, 4" straight pipe, gauges, CCV, EBPV and Wastegate line deletes, LED Sills, sweet custom headlights, smoked cab lights, Ventshades, Tint.
Traded in at 196k miles.

"Brand Newish" Truck: 02 Chevy S10 2.2L 5sp. Reg cab 4x2. Badass custom made shifter, foglights, 20% tint, AVS Vent-shades, Stock Intake mods, Electric Fan conversion .
~ 95k miles.
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post #3 of 18 Old 05-31-2008, 08:45 PM Thread Starter
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no boost gauge yet. i just bought the truck. i know there is boost but dont know how much. you can hear the turbo spool and it pulls hard when unloaded but when loaded it is a dog. will a scan tool show boost pressure?

allpro auto & offroad in michigan

2003 f250 7.3
volant air kit
4 inch exhaust
the rest is stock.
4 door,4x4,short bed.
zoodad mod
ccv mod
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post #4 of 18 Old 05-31-2008, 08:49 PM
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with a 7.3 id be checking into how much fuel preasure you have and if you have any boost leaks.



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post #5 of 18 Old 06-03-2008, 12:08 PM
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modis will tell you. the data is manifold guage pressure i think. check it for codes while you are there thats the biggest help. you should be right there with the cummins.

2001 F350 Crewcab 4X4 7.3
hypertec on stage 3
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post #6 of 18 Old 06-03-2008, 12:14 PM
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if that truck ran right that gas 6.0 would not even think about keeping up with you on a hill.pull codes and run the truck with the data stream.that will give you boost and other #s also
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post #7 of 18 Old 06-03-2008, 12:53 PM
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I towed a 15,000 lbs trailer at 75 and 70 on hills not giving it more than half throttle maybe. I also got 14 mpg doing that and 19 unloaded on the freeway

2001 F250 CC SB
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post #8 of 18 Old 06-03-2008, 01:01 PM
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somthing is wrong, my truck will get 20 to 22 mpg unloaded sounds like you might have a boost leak or maybe a fuel problem.i assume it has a new fuel filter.i have seen plugged fuel filters make a truck barley move.if it does you need to also check fuel pressure.but i am betting on boost leak.
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post #9 of 18 Old 06-03-2008, 01:02 PM
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by the way does it smoke any when you are hard in it on a hill loaded
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post #10 of 18 Old 06-03-2008, 01:05 PM
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My suggestion is to get a set of gauges and a chip or programmer. The programmer will give you codes.

Daniel, 18
Graduated 6/18/2010: Wyotech in Laramie, Wyoming for Diesel Technology with studies in Advanced Diesel
Trucks:
Dad's truck:
2002 F-250 Lariat, CC, SB
7.3 Auto Usual Mods
My Truck:
1986 Ford F150 4x4 300, 4 on the Floor, Cobra 29 WX ST CB, Dual 4 foot whips bed mounted, rusted in normal places, more than normal rust
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