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Old 04-02-2012, 01:09 PM   #1 (permalink)
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Fuel leak on injection pump

there is a little rubber tube that runs out of the pump on the back side and i think it is like an over pressure valve of some sort...but anyway it is spraying fuel put of ther when i drive but not at idle or even then i rev it up...it only leaks or sprays when im on the road
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Old 04-02-2012, 04:03 PM   #2 (permalink)
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The O-ring is leaking on the pin that rides on the fuel pin.
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Old 04-02-2012, 10:52 PM   #3 (permalink)
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Classic problem when you start messing with the fuel pin.
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Old 04-16-2012, 01:54 PM   #4 (permalink)
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how hard is it to replace and should i be worried about anything else in the pump...might as well replace anything else if i have to get into the pump
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Old 04-16-2012, 02:17 PM   #5 (permalink)
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its not that hard to replace, i just did one. if you can do a gov. spring, you can do the fuel pin o-ring. here is a post to help you out.

Fix That Leaking Fuel Pin - Midwest Diesel Connection
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Old 04-16-2012, 02:24 PM   #6 (permalink)
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Fred D Where hid you get your seal kit from, and a part No.
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Old 04-16-2012, 02:33 PM   #7 (permalink)
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funny story on that. I got the kit on ebay, a full reseal kit it said with the 3200 gov spring. Well I looked for the seal small enough for the pin and there wasnt one in there that would fit the pin snugly, they were all too big. So luckily I have a kit of o-rings any size imagineable and got lucky as there was one in there that fit. I believe the dimensions for the o-ring are on the thread i had posted.
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1988 ramcharger w/ 1993 12v and 5 spd getrag, phoenix friction stage 4 clutch, denny t stage 2, s300 over a schwitzer 4lhr-753, DAP 5x.013's, 3200 spring, 140 gph lift pump, mighty diesel head bolts, Glowshift 3-in-1 gauge
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Old 04-17-2012, 12:56 PM   #8 (permalink)
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i have a kit like that too, ill probably do a gov spring and denny t fuel pin while im at it
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