Stalling problems...
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Freshman User
Joined: Jun 2010
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Stalling problems...
Two months ago I posted in this forum that my 79 F-250 had run out of gas.
Afterwards it would start, drive 2 blocks, and the RPMs would go from 800 to
0 and I'd stall out.
Some members said I sucked up gunk from the tank and fouled the fuel filter (I have a Holley Carb Quad jet) and that should be my first step. So I changed that out AND put an in-line filter in as well to prevent any more gunk from getting to
the carb. Cheap fix, easy to do, and ran well for the next 2 months. Now with a full tank of gas, same thing is happening, it will idle just fine, but stall out down the block when I start to take my foot off the gas.
Seeing as how replacing the fuel filter is a cheap and easy task, I did that again, just in case. Also checked the fuel pump, which is pumping just fine, fuel goes all the way to the carb. Changed the carb fuel filter as well, thing looks like a little gold thimble. All to no avail, same issue.
So... where to go from here? Does this mean my carb is gunked up? I'm trying to troubleshoot but not sure where to go from here.
Thanks,
Pete
Afterwards it would start, drive 2 blocks, and the RPMs would go from 800 to
0 and I'd stall out.
Some members said I sucked up gunk from the tank and fouled the fuel filter (I have a Holley Carb Quad jet) and that should be my first step. So I changed that out AND put an in-line filter in as well to prevent any more gunk from getting to
the carb. Cheap fix, easy to do, and ran well for the next 2 months. Now with a full tank of gas, same thing is happening, it will idle just fine, but stall out down the block when I start to take my foot off the gas.
Seeing as how replacing the fuel filter is a cheap and easy task, I did that again, just in case. Also checked the fuel pump, which is pumping just fine, fuel goes all the way to the carb. Changed the carb fuel filter as well, thing looks like a little gold thimble. All to no avail, same issue.
So... where to go from here? Does this mean my carb is gunked up? I'm trying to troubleshoot but not sure where to go from here.
Thanks,
Pete
Laughing Gas
Joined: Oct 2009
Posts: 874
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From: Merlin, OR
Hey, I have the same intermittent problem with my truck which has dual tanks. I've had it to the shop several times, same issue. it'll run fine for days, and then all of a sudden it starts bucking and shaking and dies. I've rebuilt the carb, replaced filter at carb, and an inline filter. Seems with my truck at least, it's an issue with main(rear) tank. So I've heard it could be the pickup tube inside the tank itself. It has a sock like screen, and when stuff in the tank gets jostled around, that sock over the pickup tube gets plugged up. I'm going to be taking my bed off, and taking the sending unit out, and looking to see what exactly is going on. Seems that my aux.(front) tank is fine, but as soon as I switch to other tank it does this. Might be the same thing happening to yours, is your truck dual tank?
Senior User
Joined: Sep 2007
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Why not try it with a temporary "tank"? Put some fresh fuel in a gas can and tied it into the corner of your box, flip the spout up like you were going to pour gas out, run a line from the fuel pump to the can, and down through the spout, put a hose clamp around the spout to seal it to the line and prevent leakage, open the can's vent hole, and fire her up. Then you'll know if it's the tank screen.
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Freshman User
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Stalling problems..
Alright, so I did the make-shift tank, ran the fuel line to it,
drove around the block, still stalled out.
Now I was thinking, I've had a similar problem like this before
and when I got a new PCV valve it fixed the stalling issue.
But this was 6 months ago. A PCV valve is pretty cheap, no issue
with buying a new one and installing it, BUT, what would clog
a PCV valve in such short a time, IF in fact this is a PCV issue?
-Pete
drove around the block, still stalled out.
Now I was thinking, I've had a similar problem like this before
and when I got a new PCV valve it fixed the stalling issue.
But this was 6 months ago. A PCV valve is pretty cheap, no issue
with buying a new one and installing it, BUT, what would clog
a PCV valve in such short a time, IF in fact this is a PCV issue?
-Pete
