If a 7.3 goes along time without an oil change can this cause the truck to not start - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 02-09-2011, 01:57 AM Thread Starter
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If a 7.3 goes along time without an oil change can this cause the truck to not start

Can it cause the engine to not build oil pressure for the injectors
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post #2 of 15 Old 02-09-2011, 04:00 AM
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Define a long time? But no not normally

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post #3 of 15 Old 02-09-2011, 05:07 AM
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It shouldnt, I would check other things first.

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post #4 of 15 Old 02-09-2011, 06:47 AM Thread Starter
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I'm not even sure how long I know it's been more then 5000 miles since the last change but my truck has been broke down for over a year it won't build pressure when I crank it the oil pressure gauge don't move like it use to. I got post all over about it on here they are way down the pages somewhere though but I just don't know where to start I'm hoping just an icp or ipr it prob needs a cam sensor too plus batteries and more! Its gona burn a hole in my pocket I don't wanna just throw parts at it that it don't need so what do u guys think I should do? Where should I start I know its something to do with oil pressure for sure cuz the injectors aren't spraying fuel out when u crank it it just cranks like it would do if it ran out of fuel any ideas ?
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post #5 of 15 Old 02-09-2011, 10:43 AM
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if its been sitting next time check the HPOP res I bet is is low top it off and see how it is with that said if it is low it will be time for injector o-rings . dash gauge is just and on- off switch for 7 psi for the computer it is not a true pressure gauge.

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post #6 of 15 Old 02-09-2011, 12:31 PM
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+ what cratos said. A drained HPOP will certainly cause your symptoms. At least you know the drain back works if it is empty huh? I would dump a bottle of Slick 50 or whatever you have in your neck of the woods in the HPOP along with some fresh oil....and change the oil/filters as well before firing it up. Sitting that long can't be good.

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post #7 of 15 Old 02-09-2011, 03:44 PM Thread Starter
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The reservoir keeps draining every couple days and the truck prob does need new injector o rings it has almost 300,000 miles on it is there any way to tell if they are bad like would they link oil out if I crank it with the valve covers off ? Does anybody think that itsprob time for new orings at 300,000 miles? And thanks for your info guys!
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post #8 of 15 Old 02-10-2011, 05:41 AM
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It's probably one of those "while you're in there" deals. I know I would if I had the covers off with that kind of mileage...prob GP's as well if they're that old.

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post #9 of 15 Old 02-10-2011, 05:56 AM
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Hopefully mine will keep on rockin 310k and I haven't changed anything but the gpr and the cps

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post #10 of 15 Old 02-10-2011, 03:13 PM Thread Starter
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Yea it needs some new plugs too but does anybody got an idea on how much a set of injector o rings for all 8 injectors would cost??
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