loss of power on my 7.3 powerstroke - Ford Powerstroke Diesel Forum
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Old 01-26-2008, 03:33 PM
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loss of power on my 7.3 powerstroke

I'd like to explain my problem - When I started my truck up this morning it was very hard to start and it had been sitting overnight. When it warmed up it started to "hunts" and when you push the gas peddle it will idle. But then I put it into gear to drive, the truck won't move and it's lacking all it's power. Just wondering if anyone has any ideas as to what is wrong with my truck.

While driving it last night I started to lose power. At first I could only go as fast as 40 km/h and then down to 30 and just before reaching my destination I could only go 20 km/h.

Any ideas please forward your information to me.

Any help is appreciated.
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Old 02-05-2008, 04:29 PM
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is it cold enough for your fuel to gel? it sounds like it is running out of fuel mabey ice in your fuel filter
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Old 02-05-2008, 04:46 PM
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does sound like a possible fuel problem possibly, need to run a fuel prerssure test , shrader vale on the side of the fuel filter , will climb to around 45 -50 lbs when cranking and should increase up to 100lbs while driving under load , also make sure oil is full and in good condition , maintenance is a major part of keeping the engine running properly , get codes pulled and see if there are any , need ton start here , there are some other things it could be ,start with the basics
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Old 02-06-2008, 08:09 AM
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Yeah I would start with checking fuel filters and the fuel pressure. Make sure the pump kicks on and its stays on for about 20 seconds when you turn the key on. You may also want to see if you have any injector codes or wiring harness(injector) codes.
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Old 02-11-2008, 10:32 AM
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My Truck was having the same problem and the dealer found a bad harness that runs under the valve cover that goes to the injectors. I guess the torque from the motor puts stress on this harness.
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Old 02-12-2008, 02:04 PM
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what year is it but it sounds like you could have lost one whole bank of injrctors the valve cover gasket also houses the wires for the injectors and if it finally gets thin and shorts a whire you lose that whole bank of injectors truck will not move ang little to no response on the pedal.
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Old 02-12-2008, 02:20 PM
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my .02 When mine did exactly that it was 0-rings. Had them replaced everything runs good.
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