help with 7.3l

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Oct 15, 2011 | 02:28 PM

daleyboy

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Cross-Country

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help with 7.3l

i have a 88 ford f250 non turbo 7.3l .For the last 2 mornings it started up as usual, but after about 4 or 5 seconds, it died. I knew it sounded like it ran out of fuel, but knowing i had a full tank, i loosened the fuel line at the injector and on the second cycle of cranking it over, it started right up. I tightened the line back up and it started good all day. But this morning it did the same thing. I thought there might be a leak in the suction side of the fuel pump , but i inspected it real good and didn,t find any problem. Cound it be i need a new fuel pump? thanks in advance

Oct 15, 2011 | 02:53 PM

Country_boy_2007

Fleet Mechanic

Joined: Nov 2010

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From: Kville, ohio

dose it only do it after it sits for a long period of time, like overnight? id probably guess air intrusion

Oct 15, 2011 | 05:15 PM

daleyboy

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yes, it only does it after its been sitting all night

Oct 15, 2011 | 06:01 PM

gumper 123

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check all your return lines and look at the return line caps for any leaks

Oct 15, 2011 | 09:44 PM

Aune163rd

Logistics Pro

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From: Victor, MT

Just because there is no diesel on the return lines doesnt mean its not sucking air....it could be dry as a bone and suck air....

Oct 15, 2011 | 09:50 PM

IDIDieselJohn

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From: Ottawa, Ontario

Yep, definitely sounds like a common case of Air intrusion.

Oct 16, 2011 | 12:50 PM

daleyboy

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about a week ago i was putting a new glow plug in my truck and bumped and moved the cap on top of the injector a little. It was no big deal, it didn,t leak and the truck ran fine.But just a couple of days ago it started having this problem. I decided to change the line between the 2 back injectors because it looked old, after looking at it under a magnifying glass i noticed it had a bunch of tiny cracks all the way around the end. I put a new piece on it and this morning it started up and ran like it was supposed to do. You guys are right, it don;t have to be leaking to be sucking air. many thanks