After getting tons of useful tips here, and installing new, old stock OEM FP, a new strange problem occurred today, which I can't quite figure out. I'll explain: after finally getting the arm that actuates the diaphragm to move, I installed the pump, primed the system by putting a little gas down the carb, fired it up. It started on the first crank, something it hadn't ever done before, especially in winter. The average temp these days is around 18-25 F in the day, dropping to zero, or close to it, at night. So, I live 12 miles from from the nearest town, on a farm. The road to town is narrow and has no shoulder, so it's really a drag to have your truck just stop dead.
Well, I decided to drive into town. I was impressed with the way the engine seemed to respond quickly when accelerating. About 2 miles from destination, running about 45mph, the truck started to lose power. It didn't shut down like it did when the pump failed, but it slowed down, and I downshifted to 3rd. Up ahead I saw a place to turn around. I slowed down, turned off the road, out it in neutral. It idled fine at about 550rpm. I turned around, pulled out, made it home okay. It didn't do it again, until I was about 100 yards from our place.
I left it running, opened the hood, there was gas in the filter, gas in the glass on the carb. None of the numerous vacuum hoses look to be disconnected or cracked. I shout it off, started it again about 4 hours later. It started right up on the 1st crank. I looked in Haynes manual, and quickly found all sorts of possible culprits: points, spark plug wires, vacuum advance, fuel hoses, etc. I'm wondering if anyone can tell by my explanation what the problem may be. I'm wondering if it might be the high speed jets in carb, and perhaps if running carb cleaner might fix it. I'm not wanting to disassemble to carb as I don't have a heated garage. One thing I noticed is that the new fuel filter is only about 1/3 full, below the paper element, and when the engine is running, it seems like there are little air bubbles inside, right where the line to the carb is. In all my years of having this truck, it's never behaved like this before. Could the new pump somehow be bad? Could this be the beginning of a cascade of problems that are appearing now that the fuel pump is running at increased pressure? I have a lot of questions, and I'm sure some of you probably have a better idea of whats going on than I do.
Well, I decided to drive into town. I was impressed with the way the engine seemed to respond quickly when accelerating. About 2 miles from destination, running about 45mph, the truck started to lose power. It didn't shut down like it did when the pump failed, but it slowed down, and I downshifted to 3rd. Up ahead I saw a place to turn around. I slowed down, turned off the road, out it in neutral. It idled fine at about 550rpm. I turned around, pulled out, made it home okay. It didn't do it again, until I was about 100 yards from our place.
I left it running, opened the hood, there was gas in the filter, gas in the glass on the carb. None of the numerous vacuum hoses look to be disconnected or cracked. I shout it off, started it again about 4 hours later. It started right up on the 1st crank. I looked in Haynes manual, and quickly found all sorts of possible culprits: points, spark plug wires, vacuum advance, fuel hoses, etc. I'm wondering if anyone can tell by my explanation what the problem may be. I'm wondering if it might be the high speed jets in carb, and perhaps if running carb cleaner might fix it. I'm not wanting to disassemble to carb as I don't have a heated garage. One thing I noticed is that the new fuel filter is only about 1/3 full, below the paper element, and when the engine is running, it seems like there are little air bubbles inside, right where the line to the carb is. In all my years of having this truck, it's never behaved like this before. Could the new pump somehow be bad? Could this be the beginning of a cascade of problems that are appearing now that the fuel pump is running at increased pressure? I have a lot of questions, and I'm sure some of you probably have a better idea of whats going on than I do.