Re: [MV] M884 FUEL SYSTEM PROBLEM

From: kuhrick (kuhrick@comcast.net)
Date: Tue Jan 20 2004 - 13:22:59 PST


i did have to replace the short rubber fuel line in front of the right
back tire on the frame
ken uhrick

At 03:34 PM 1/20/2004, James Shanks wrote:
>It sounds to me like you have a pinhole in your supply fuel line
>somewhere. That is between the fuel pump and the fuel tank. Think about it
>...if the mechanic has to lightly pressurize the fuel tank to get fuel
>going there is a leak between the fuel tank and the fuel pump. Check
>carefully any rubber fuel lines from the tank to the pump for cracks,
>pinholes. Also check the metal fuel lines as well.....remember how old she
>is. If it was me I think I'd replace all the fuel lines from where they
>exit the fuel tank to the pump. The line from the pump to the carb is
>pressurized so a leak will quickly become self evident. Think logically
>???? The pump SUCKS fuel from the fuel tank and PUSHES it to the
>carburetor. Hence the smallest pinhole not visible to the naked (???) eye
>will allow fuel to drain back to the tank. HINT start replacing the rubber
>fuel lines from the pump to the tank whether they need it or not. There
>are teeny tiny balls in the intake and output of the fuel pump that act as
>check valves so presuming they are ok. If the fuel drains all the way back
>into the fuel tank an in line electric pump won't work if there isn't any
>fuel in it to move, it would have to be installed like a modern vehicle
>with a in the tank fuel pump sending unit.
>
>
>Jim
>
>n1vbn@arrl.net
>
>
>At 03:11 PM 1/20/2004, kuhrick wrote:
>>my m886
>>i have had 3 fuil pumps on it and 3 carbetaters on it
>>float boll was leaking
>>last cab fixed it
>>i was carrying either to start it if it didn't take off
>>i still think about a elt fuel pump close to the tank
>>rubber fuil line thru frame infrunt of right back tire
>>i was thinking bout a push btten or a iol lite switch in the fuel line
>>by the carb
>>less than 2-3 lbs starts thje elec pump
>>ken m886
>>
>>
>>
>>
>>At 02:05 PM 1/19/2004, Mel Miller wrote:
>>>Howdy List,
>>>
>>>I hope someone can help with my fuel system problem. I have a stock
>>>military 318 engine in my 1977 M884 pickup. I recently replaced the
>>>Carter carburetor with the military Holley carburetor. The fuel pump is
>>>relatively new and flow rate and pressure exceed specifications.
>>>Ignition and timing are set properly and firing properly. The plugs are
>>>clean and a uniform gray. When I run it every day or every other day
>>>everything is OK. If I let it sit for a week or so and then crank it it
>>>will run for a few seconds and then die. no amount of cranking will get
>>>it going.
>>>
>>>Careful inspection reveals a dry float bowl, dry inline fuel filter dry
>>>fuel pump and dry line back to the tank. I have never seen a situation
>>>where fuel siphons back into a tank from a float bowl. This has happened
>>>twice now. A mechanic who specialises in Dodges says that he had to
>>>pressurize the tank to get the fuel back to the fuel pump.
>>>
>>>All ideas gratefully explored.
>>>
>>>TIA,
>>>
>>>Mel Miller
>>>Corpus Christi, TX
>>>361-937-3317
>>>M725
>>>M884
>>>86 VW Doppelkabin Drop Side Diesel PU (OD)
>
>
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