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  #1  
Old 12-08-2010, 11:30 PM
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rancherman rancherman is offline
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Default fuel pump??

tonight, my '97 5.9 gasser sputtered to a stop. When I tried to restart it about 10 minutes, it did start and run for about 10 seconds. additional attempts had it only hitting on one or two cylinders.... but not for long. It finally just turns over. no smell of raw gas either coming from the exaust.

After pulling it home to the shop, I disconnected the fuel line from the rail, and 'keyed' it. nothing. nary a squirt. I even 'thumped' the bottom of the tank to 'jar' it loose..... I heard it works....'sometimes'.

This truck now has close to 260k miles, and before I go and plunk down 200 bucks for a new pump.....am I missing anything to check?
Should I check for electicity at the tank first... and if I do, will having the key in the 'run' position be enough, or should the engine be 'cranking'?
All probability it's the pump... but if it's the relay, or some other 'sensor' that tells the pump to kick in....I would like to check it first!

Thanks friends!
Bob
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  #2  
Old 12-09-2010, 03:12 AM
ocl ocl is offline
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i would make sure u got a good ground first,then a rellay,then the pump
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Old 12-09-2010, 03:28 AM
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GTyankee GTyankee is offline
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if you hear it pumping sometimes with the key in the power position, especially when the key is first turned, i'd check other things first

dropping a gas tank that is over 1/2 full is a chore in itself, empty it is still not a walk in the park

i know some people that rather pull off the bed of the truck than go through the hassle

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Old 12-09-2010, 09:27 AM
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rancherman rancherman is offline
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btw. what is the typical 'service' life of the oem pump? with 260k miles, what are the chances this is the original one? I know running em close to empty will shorten life up considerably...
and ethanol no doubt is a dryer fuel...
Bosch makes a turbine style pump, less friction, and pricey too! about 265$
I was going to just snag the tank off the '95 and put under the '97.... but NOOOO... different pump, and electrical connection. grr..
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Old 12-09-2010, 09:52 AM
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With that kind of mileage, I wouldnt be surprised to find a bad pump. Check the power and ground at the pump connector with the engine cranking or the relay jumpered. If you have good power and ground, it's time for a new pump.

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Old 12-09-2010, 08:17 PM
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Thanks randy! That answered my question... "when should voltage be present"..
(during cranking)
Dark green and blk stripe wire is for running the pump.

Good people on this site
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Old 12-20-2011, 08:50 AM
Crztexan Crztexan is offline
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Im having an issue. I replaced my pump and still same problem i had before which is the truck initially starts and runs fine but when i get to my destination and turn truck off when i turn key back on the pump doesnt kick in and truck wont start unless i let it sit for about an hour. What could be causing that? I dont know jack about electric issues. I have a 97 ram 5.9 liter. What could it be and where is the location of that problem? Thanks yall
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