1999 7.3L won't start :help1: - Ford Powerstroke Diesel Forum
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Old 02-16-2008, 04:03 PM
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1999 7.3L won't start :help1:

It was running poorly, idled ok but when given throtle it had no power and was jerking off and on to full power then back none. I could hardly keep it going 35 mph. I got home started wiggle testing the wires on the sensors and the uvc harness and it died. Now it seems like there is no fuel to the injectors, but there is fuel to fuel filter. The HPOP is full of oil. If I take the wire off the icp sensor it sounds like the injectors are clicking with it on there is no clicking.
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Old 02-16-2008, 04:30 PM
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Welcome to the org first off. And might have a bad crankshaft sensor. Change the fuel filter lately? Would lean toward the crankshaft sensor though.
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Old 02-16-2008, 04:35 PM
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just had that replaced under recall and the fuel filter was changed recently, I think it has something to do with elecrical. Because it died while wiggling the wires and havent seen any white smoke out of the exhaust and the tach moves when cranked over.
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Old 02-16-2008, 04:40 PM
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Not sure but I read on the org. somewhere that the wiring harness to the injectors go bad under the valve covers.
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Old 02-16-2008, 04:45 PM
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Quote:
Originally Posted by eschaner View Post
Not sure but I read on the org. somewhere that the wiring harness to the injectors go bad under the valve covers.
exactly....take the valve covers off....the under valve cover harness on at least one side has sagged at the connecter and come disconnected
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Old 02-16-2008, 04:48 PM
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If one side came disconected would it cause the whole motor to be dead?
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Old 02-16-2008, 04:51 PM
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yes.....when even 2 cylenders dropp out it can kill a motor sometimes....if 3 or 4 are dead it definately wont run
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Old 02-16-2008, 04:53 PM
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but will it fire at all?
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Old 02-16-2008, 04:54 PM
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maybe, maybe not...depends on how many injectors have dropped out...
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Old 02-16-2008, 04:58 PM
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The clip on the connector for the uvc harness is broke on the top side of the valve cover on the drivers side.
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