truck won't start. - Ford Powerstroke Diesel Forum
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Old 10-08-2005, 12:55 PM
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truck won't start.

I have a 1999 7.3 powerstroke. Lately it has been slow to start with a slightly longer cranking time. It seems to be worse in the morning when it sets overnight or long days at work. I went this afternoon to start it and it won't. I'm wondering if it could be the fuel pressure. I thought maybe my betteries were getting week but it will crank it for a long time now.Any thoughts on what it could be before I take it in on Monday?
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Old 10-08-2005, 01:47 PM
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Check your fuel pressure after the truck has sit for a while. If pressure is not staying up, check either the backpressure regulator or fuel pump to see if either is leaking back to the tank. Oh yeah, check your fuel pressure when the truck is running for comparison. Good luck!! Also make sure the fuel pump is comong on when you switch your key to on.

Last edited by wiwaniuk; 10-08-2005 at 01:48 PM. Reason: another thought
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Old 10-08-2005, 01:58 PM
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Fuel was also leaking out under the truck. I think that was from checking the fuel filter and not getting the cap tight but it aslo is leaking out of a 1/4" tube that hangs down on the passenger side. It looks like an overflow or somthing.
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Old 10-08-2005, 05:26 PM
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That could be your drain valve on the fuel filter. Check the valve and make sure it is closed completely. I have heard of these going bad and having to be replaced. I would take the truck to the auto parts store and let them check your batteries. They may crank the truck BUT they may be weak and not spinning it like they should.
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Old 08-09-2007, 04:28 PM
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I also have a 1999 and was having the same problem. the truck would crank slower than normal in the morning or when cold but seemed to crank at the correct speed when it was warm. I checked the batteries, connections, resistance in the cables. I found a thread that advised that the bushing in the starter goes dry and causes it to bind (assuming the theory that the heat swelled the bushing faster than the starter winding shaft causing less binding during warm starts). I found that the gear reduction gear grease had dried as well as the bushing grease but I also found that two of the starter brushes were not sliding. A closer look revealed that the brushes are cracked lengthwise (I have never seen this). This may be a common thing with mileage and age, I dont know since I never took a starter apart in hopes to save it. Hope this helps.
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