Jeff.
I'm a little confused. In your first post you said when it stalls it acts like its starving for fuel, then you say it acts like it flooded. Since you have a electric fuel pump on her do you know what fuel pressure you have ? Do you have a pressure gauge near the carb. You should be getting any where from 4.5 to 5 psi . Any more then 5 you could be flooding it and if its too low you will be starving it .... Just my .02
I thought it might have flooded earlier because it quits and then won't restart until it rests for a half hour or so. Also thoughts it might be vapor lock, but I am thinking I was wrong on that original diagnosis after working on it some more. Now, I am leaning toward more of a fuel starvation issue because the clear fuel filter has almost no fuel in it when the truck quits.
I have an electric fuel pump on it, but it says it is a .5 psi to 4 psi pump. Should I replace the fuel pump with a higher psi, assuming the fuel pump is not pushing enough fuel at this point to keep her running?
Before you replace anything I would install a pressure gauge before the carb. and after the filter, then you will be able to see if your fuel starving the motor when it stalls out on you.
Do you have the original pick up on the fuel line in the tank? The ethanol killed my first one and the NOS replacement. It would partially clog but if left to sit, would unclog enough to run fine again for a while. I took it off in favor of in-line filters I can monitor better. Could also be the fuel pump failing after it gets warm, it is an electric motor.
There are a lot of things going on at once. I have had a similar problems here is what I found along the way.
My engine used to stall when it got warm, about 10 to 15 minutes running. Went through a whole list of things and finally came down to a compression test. Results was low compression in all cylinders.
A little while later it started again, ( I put in a different motor) this time my in tank fuel screen had came off and the previous owner had used some type of silicone and the pick up tube would suck it up and "hold" it until I blew back through the fuel line. Took the tank cover off and found the problem.
The only way to trouble shoot these things is to pick a component and work through it. Goes without saying that you need Fuel,air and an ignition source all happening at the right time.
I would let it run for a bit and warm up and then do a compression test.
You have checked and you have spark
You have fuel flow, just done know if it is consistent. You could pull the line off and run it into a 5 gallon can and watch and see what happens. Standard safety practices should be observed. If you noticed anything odd, uneven flow, might want to clear the lines.
Again, I have found it helpful to only chase one gremlin at a time, until you catch the little sucker! Just some issues I have ran into. Hope it helps.
Well gents, I think I finally fixed it. Put a new fuel pump on this morning and it has not stalled out all day. I would say that was the culprit. Thanks everyone for all of the advice.
GOOD MORNING, SOUNDS LIKE TO ME SHE IS FLOODING, COULD BE A BAD FLOAT VALVE OR FLOAT??
I HAD A SIMNILAR PROBLEM, DRAINED TYHE CARB BOWL A COUPLE OF TIMES AND ADDED CARB CLEANER TO THE TANK. NO MORE PROBLEM.
GOOD LUCK
BOB
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