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Tractor Pulling Discussion Forum

Off topic,, 7.3 diesil question,,,

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ChadS

10-02-2004 10:09:07

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Ok, Sorry for the off topic here, My 93 F-350 died on me. Need some help,, What had happened, was, I got some bad fuel from the station, and had a lot of water in it. I had to drain and flush out the fuel system,, I cant seem to get the injector pump bled to the injectors now. I had tried to use the starter to rotate the engine to prime the system, but,, that is alot of wear and tear on the starter,, and to no avail, still wont pump up,, Got fuel to the pump, but wont bleed through,,, What is happeneing here? Is the pump not priming because of the slow rate at which the starter rotates the engine? Even if the stater could handle cranking it,, it would probably take 1 hr or so to actually prime it,, any ideas on how to get it going?? I have not ruled out the pump going out,, but it ran the nite before after changing the bad fuel out with new,,, I had shut the engine off, and would not start the next day, I opened up the lines to the injectors,, nothing there,,, is it being a (^&%^*(&^ to bleed, or should I look for a new pump? Any info would be great! Thanks, in advance,, ChadS

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Chris Brown

10-03-2004 16:29:33

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

loosen the injector lines and drag that sucker around.Look at it ocasionally and when you get good fuel spitting,tighten them down and drag it some more. I had a 6.9 I changed the pump on and I liked to have never got it bled out I must have dragged that thing 3 miles.

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560 puller

10-03-2004 08:10:49

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

I'm certainly not an expert but I had trouble with my 7.3 a couple years ago. It was still running okay when the change filter light came on. I changed fuel filter, it started, smoked, bucked and shut-off. It would not bleed at schrader valve. Eventually found delivery pump was bad. If you need to change this pump, make sure engine is at top dead center (marked on balancer) pump is difficult to install otherwise. After replacing delivery pump I picked up 10 mph towing over the same PA hills and it starts much easier now.

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Leland

10-02-2004 22:01:08

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

Chad have you checked delivery pump had one quit the very same way

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ChadS

10-03-2004 07:12:58

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Re: Off topic,, 7.3 diesil question,,, in reply to Leland, 10-02-2004 22:01:08

I had put a new fuel pump on it, it is working. Chad

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Leland

10-03-2004 07:31:07

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-03-2004 07:12:58

Those 7.3s can be a devil when you have a fuel problem our cost for repairs where skyhi but the boss took my work truck to a IH heavy truck dealer 100 bucks an hour.

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KEV

10-02-2004 19:39:40

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

CHADS
Do you have any carb venturies or bottom half from a 806 carb?
Building a 600CI W-9.

Need more AIR

KEV

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ChadS

10-03-2004 07:21:07

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Re: Off topic,, 7.3 diesil question,,, in reply to KEV, 10-02-2004 19:39:40

Yes, I have a few around. venturi, and the lower carb bowl. Do you want the bowl rejetted? ChadS

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720Deere

10-02-2004 19:35:14

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

Chad,

I've dealt with quite a few engines of that family line over the years. Have seen them run out of fuel before or changing fuel filters, it's the same effect. The fuel filter mount should have a schrader valve facing toward the rear of the truck. Usually if you open that while cranking the starter, it will bleed itself. I have never needed to crack an injector or pump line. After the trouble with water, I would suspect the water seperator has gone caput on you. It is a fairly common problem on those engines. Ford recommends pulling the drain plug on them at certain intervals(which hardly anybody ever does), but every time I've seen someone disturb the drain or have a known water problem the seperator had to be replaced. It's been a long time, but I think they run around $60 or so.

I have to say that we are a little disappointed that you need help with an International motor!! Ha! HA!

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ChadS

10-03-2004 07:19:29

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Re: Off topic,, 7.3 diesil question,,, in reply to 720Deere, 10-02-2004 19:35:14

Tell me about it! LOL! The truck was running erraticly for about 20 miles, smoked like a freight train, fuel filter was full of water, after I had drained it the nite before, Has good fuel now,, I am going to drag it around the block see what happens Chads

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KEV

10-02-2004 19:07:21

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

CHADS
Did you fill the filter with fuel before you installed it? Sometimes these fuel systems take awhile to get ALL the air out.Make sure you have all 8 lines loose at the injectors and crank the motor. If you spray wd-40 down the intake while you crank the engine it will crank faster and easier.Make sure the lift pump on the block is good, if these are bad you will have alot of trouble starting it after cleaning out the system like you did. Hope this helps!!!
Email me if you have any other questions as I work in a fuel injection shop.
Can get you a pump at a reasonable price if you need one.
Thanks
KEV

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ChadS

10-02-2004 19:19:51

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Re: Off topic,, 7.3 diesil question,,, in reply to KEV, 10-02-2004 19:07:21

Yes, Filled it, and bled it to the injector pump, Loosened the lines up, cranked for about 5-8 minutes, (Not constantly) Nothing yet. Gonna try to pull it around to see if that speeds things up before removing the pump. Been told the shaft slides out, without removing the actual gear itself, (3bolts on the pump). When I bought the truck the fuel pump was out of it, replaced it, but did pull it around to get it going. may not have turned it over enough yet, Thanks, will check it over again, ChadS

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KJM

10-02-2004 20:17:56

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diesel air in reply to ChadS, 10-02-2004 19:19:51

ChadS, On the older Chevys we had to open the bleeder and blow shop air through the filler neck on the fuel tank, that would bleed them right out and a lot cheaper than a new starter.

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DCTOM

10-02-2004 15:16:54

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

CHADS IF IT IS A MANUAL TRANNY HOK ON TO IT AND DRAG IT TO BREMEN AND BACK LOL DC

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ChadS

10-02-2004 17:31:31

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Re: Off topic,, 7.3 diesil question,,, in reply to DCTOM, 10-02-2004 15:16:54

Thought bout it. See ya in the morning,ChadS

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BUDD

10-02-2004 10:34:41

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Re: Off topic,, 7.3 diesil question,,, in reply to ChadS, 10-02-2004 10:09:07

Chads;

Try to web site. I am sure they have the answer for you!

>Link

>Link BUDD

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