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  #1  
Old 03-19-2013, 07:55 PM
H-Hole12 H-Hole12 is offline
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Default 88 D100...starts but quits

I have my 88 D100 in shop right now...mech has discovered new problem...truck turns over and starts but shuts down after about 15-30 sec of running.Truck will run when key is in "start" position only.Has new ignition switch (not key) and distributor reluctor...truck went in originally for leaking fuel tank...my bad...didnt put new clamp on hoses i replaced..any have ideas on the shut down?
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Old 03-20-2013, 12:10 PM
Gen1dak Gen1dak is offline
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First thing I'd check would be fuel delivery. Failing pump, clogged filter.
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Old 03-21-2013, 03:13 AM
H-Hole12 H-Hole12 is offline
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getting fuel...only runs with key in "start" position...dies after about 30 seconds in "run" position
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Old 03-21-2013, 11:22 PM
Gen1dak Gen1dak is offline
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So you can repeatedly start it up and then it'll tail off after a few seconds each time? I'd still confirm it isn't fuel starvation. If that checks out, then go for a failing old component like the ASD relay, or even computer.
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Old 04-08-2013, 08:16 PM
H-Hole12 H-Hole12 is offline
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Ok..so it seems the truck only runs when alternator is disconnected...connect it and it dies.There is a fairly good-sized spark when attaching....fuel pressure good...runs good without alternator connected....possible dead short or bad wire in charge system....ECM checks out good....tried NEW alternator with same results....any ideas?
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Old 04-11-2013, 09:21 PM
Gen1dak Gen1dak is offline
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Hmmmm. Interesting. Lemme check a couple things in my FSM. Might point in the right direction.
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