SO here is the issue. I have a super reliable 93 carry F6A. Had GR rebuild the carb 4 years ago and has run like a top since. Can't say enough about their work there. Have not used the truck much over the winter. THe last couple of gallons of fuel in the tank are from about 6 months ago and it 87 octane. I know I know not a good choice. wasn't by design and I have been telling myself recently that I have to get that fuel ran through it soon as to avoid any bad gas issues etc. As spring progressed I had the truck out a very little bit. My son and I went on a 10 mile ride on a Saturday ran great. We went again on the next day and when we stopped I noticed that it idled a bit high at rest a few thousand, not dramatic but a little high. 2 days later I fired it up waited for it to worm up for a few minutes. Went to take off and it almost died when I let the clutch out. Hmm that's weird she never does that. Let the clutch out again and the same response. revved it up to get the rpms up let the clutch out and took off. Noticed that if I stab the gas pedal the engine wants to die and bog under a load. Also will not idle. pretty much wants to taper off and die immediately at idle. ran it for a mile or so and circled home. I took the carb boot off and noticed a bunch of dirt and fuel residue in the carb boot. Why do these trucks get so dirty there. I have noticed this before and cleaned it but with tight connections you should not get this grimy of residue at the carb like that. started it up and watched the choke plate. backing off normally with temp increasing etc. What I did notice is that the little accelerator pump? on the air cleaner side of the carb. WHen that is injecting fuel the truck revs up normally, when that stops pumping fuel like at idle and several other times in the observation it wants to bog out. I siphoned out all of the old fuel, will now add three gallons of fresh high octane fuel and go from there. Any thoughts. Just is one of those odd scenarios that one day its fine the next day its a 1300lb paper weight. And as with off fuel issues you are always guessing until it is fixed. Not like if a strut falls off, that a guy can see. I have a battery charger on it to ensure strong battery etc. Will replace fuel filter to ensure proper fuel pressure but from there I don't really have any ideas. All vac lines are on and tight. All are silicone type with very god seals. I don't think it is the idle selanoid because sometimes when it dies I can crank it and re fire it and it will idle fine for a couple seconds and die. Any thought are much appreciated.