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fuel line quesions

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Old Apr 16, 2009 | 05:29 PM
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fuel line quesions

I have a 92 f250 with the 7.3. Its got a pretty healthy fuel leak so i dropped the tank and the fuel lines for the front and rear are looking pretty bad. it seems to be leaking alot from the rear lines (but that tank doesn't work?) anyway, i need the little plastic clips that go into the connector for the fuel lines where can i find them? Would a leaking fuel line allow fuel into the system and make for hard starting?
 
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Old Apr 16, 2009 | 10:05 PM
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You can get repair ends from most parts stores. If it is leaking visibly, you can bet that air is getting in and causing your hard starts.
 
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Old Apr 17, 2009 | 03:48 AM
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i agree with fellro86 if you can see a fuel leak you found the hard starting issue,or atleast a healthy start.
 
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Old Apr 17, 2009 | 03:10 PM
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I only use the front tank. The rear tank doesnt work and there is some fuel in it and its leaking from the rear tank lines. Will this still affect the starting?
 
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Old Apr 17, 2009 | 03:14 PM
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The rear tank leaking should not affect starting or running while you are on the front tank.
 
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Old Apr 17, 2009 | 03:18 PM
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That would make sense but since im a noob to diesels i figured id ask. can i use rubber fuel line to replace the rear lines?
 
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Old Apr 17, 2009 | 04:00 PM
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I would not use standard rubber fuel line it is not to compatible with diesel.
The hard plastic air brake line may be a cheap alternative at about .50 cents a foot and you can get all kinds of compression fittings for it.
This line is used on many reefer units for fuel line.
 
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Old Apr 18, 2009 | 10:55 AM
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I changed the fuel lines for the front tank and now it wont start. I tried to bleed the air with my shraeder valve and no luck. any ideas?
 
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Old Apr 18, 2009 | 11:11 AM
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Where did you change the lines from the tank to the selector valve?
Are you getting any fuel at the schrader valve.

I am curious you said your rear lines are leaking but the tank doesn't work when does it leak.
 
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Old Apr 18, 2009 | 11:37 AM
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i changed the lines from the front tank to the selector valve. The rear lines leak like a siv anytime its parked. i took all the fuel i could out of the rear tank so hopefully it will stop. my shraeder valve is shot i can pull the needle out, its not even attached. i put the needle back in and put a metal valve stem cover on it. (where can i get a new one)
 
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Old Apr 18, 2009 | 12:22 PM
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The schrader looks just like an air valve core , but I'm not sure about using an air one maybe somebody will chime in on this.

Was your rear tank over full. I don't see how it would be leaking, your selector valve isn't bad is it.
 
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Old Apr 18, 2009 | 08:45 PM
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I've used tire schraders with no problems. Look for the ones with the clear seal on the bottom, they seem to be best.
 
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Old Apr 19, 2009 | 01:46 PM
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The selector valve was working before i parked it to do the work. I filled the fuel filter with additive and fuel and it would start for a second and then shut off. And also from what i saw you cant mix up where the hoses go because one is bigger than the other one on the tank the same goes for the selector valve right?
 
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Old Apr 19, 2009 | 02:10 PM
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i have fuel at the sch. valve and still no start. it will kinda stay started if i hold my foot on the pedal but barely and then if i let off it shuts off. i need help this stupid thing is my dd and money maker. thanks for any help
 
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Old Apr 19, 2009 | 03:38 PM
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It sounds like you are sucking air somewhere. You can do a fuel pressure and volume test at the schrader valve, it needs 4 to 6 lbs pressure and 1/3 pint in 10 seconds of cranking.

I have several times not been able to find an air leak on the suction side until I put a little air pressure on the tank and then it would leak diesel. If you do this be careful as it doesn't take a lot of pressure to damage a tank.
 
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