7.3 idi non turbo no start help!! - Diesel Forum - TheDieselStop.com
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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 05-21-2012, 09:02 PM   #1 (permalink)
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Angry 7.3 idi non turbo no start help!!

i have a 92 f350 with the 7.3 idi non turbo. it has a brand new injection pump and injectors. the other day i was driving about 65 when it seemed to lose fuel and started slowing, shut down and temp went hot now it is slow to crank over and hard to start. I'm getting fuel through the filter but doesn't seem to be getting to the injectors when it has cranked it just does not seem in time. i got it to fire two times so far once on either and once with out. when running it seems to be extreamly noisy i think the sound may be coming from the injection pump and has excessive blow by now. none what so ever before this event. i have craked the injectors trying to get the air out of the lines and still only get a small drip at the injectors. please help
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Old 05-21-2012, 09:16 PM   #2 (permalink)
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Your not going to get much more than a dribble at the injectors with just starter RPM's. How much fuel is in the tank your drawing fuel from?

If it is turning over slow enough for you to count the revolutions, you need a new starter or batteries.
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Old 05-22-2012, 12:00 AM   #3 (permalink)
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Who installed the new injection pump........

Are the 3 bolts securing the injection pump to the housing tight......

Does the engine have a new water pump......
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Old 05-22-2012, 05:49 AM   #4 (permalink)
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The ip was installed by the previous owner 2 weeks before I bought the truck. The 3 bolts holding the pump on were loosened to try to time the pump but were tightened back down. Not sure on the water pump. The tank was about half full
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Old 05-22-2012, 06:52 AM   #5 (permalink)
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Does the cover the IP is attached to look like it was removed recently....... Chiltons directions for changing the IP say to take the gear cover and IP off together.......

THEIR PROCEDURE IS INCORRECT AND WILL CAUSE LOSS OF BASIC TIMING
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Old 05-22-2012, 07:23 AM   #6 (permalink)
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It looks like the plate on the front of the timing cover was recently removed and has been siliconed back on
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Old 05-22-2012, 03:47 PM   #7 (permalink)
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That would be normal to have the plate R&R'd........ I'm more interested in the gear cover.


Ziggz info re timing gear.........If this does not work I have bits of info.

http://www.members.shaw.ca/k2pilot/T...ump%20gear.jpg
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Old 05-22-2012, 04:57 PM   #8 (permalink)
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Well after the truck has sat since Sunday it will fire right up now. My concern is that it has some pretty intense blow by and its seems to have a loud knocking sound. Doesn't exactly sound like a rod knockin but the oil pressure guage is irratic now. It I rev it up the knocking smooths out and the oil pressure gauge goes to normal range. Any way to know if I have some bottom end issues with out pulling the pan?
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