Won't Crank
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Freshman User
Joined: Jun 2012
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Won't Crank
I have a 1996 F-250 with the 7.3 PSD. The truck was running great and all of the sudden was hard to crank and now won't crank. The batteries, starter, altnernator are all good. The following parts have recently been replaced: IDM, CPS, glow plugs, valve cover gaskets, fuel pump, fuel filter, oil filter, key switch.
Numerous computers have been put on with no codes being thrown. Buzz tests have been run and if the test goes through it will crank and if it will not "buzz" it will not crank. It is like it is loosing it's prime but there are no leaks, and pressures all check. Does anyone have a fuel system flow chart that maybe we can start ruling out sensors.
Numerous computers have been put on with no codes being thrown. Buzz tests have been run and if the test goes through it will crank and if it will not "buzz" it will not crank. It is like it is loosing it's prime but there are no leaks, and pressures all check. Does anyone have a fuel system flow chart that maybe we can start ruling out sensors.
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Freshman User
Joined: Jun 2012
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Sorry I'm just an old Florida Cracker. It will turnover but won't start. Starter spins and spins and checks out fine.
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
Start here ... http://oregonfuelinjection.com/pdf/f...diagnostic.pdf
Cargo Master
Joined: Apr 2010
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On long cranks, does white smoke come out of the tailpipe? If no, check the voltage off the batteries while cranking.
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So sometimes it passes the buzz test and sometimes it doesn't, is that what you mean? If that's the case, when it fails, does it fail to get the test going at all, or does it buzz the injectors and then report errors with certain cylinders?
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Freshman User
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No when a buzz test runs there are no codes but the test will not always go run, like there is no communication.
