Ok, I Am Officially Getting Tired Of This Crap

I will. Plan is to do some more driving with Willie today. Unfortunately, I haven’t found any true gas up here yet to see if that would help. There is a place back in Texas so next trip I’ll be bringing some Jerry can up with it.

 

So today I pulled the carb horn so if it happened I could see inside the throat. We took a ride up and down hills, thru the forest to grammas house. It was even a little warmer since we headed out at lunch time. And an hours worth of driving and no issue. This is the crap I’m tired of. Doesn’t happen, then does, then doesn’t. In fact ran very well. Do some more tomorrow.

 

Checked the air filter/oilbath?

 

Checked the oil bath several weeks ago and if it were that, I would think it would happen all the time, not wait 5 mins then go. Did absolutely nothing else. Didn’t even talk nice or threaten, or anything. Going to venture further tomorrow.

 

One crazy thing that happened to me one time was squirrels or mice filled the muffler with acorns. Would start and run, but then choke from the back pressure - then rinse and repeat. A plugged catalytic will do similar. High altitude would aggravate the effect with rich mixture.

Observing a manifold vacuum gauge during your trouble cycles might be interesting.

 

I agree...... Sound's like your starv'n for fuel , Air , or both , Doesn't it ?

 

Not likely the case here, but I had a 1960 Benz 190Db (diesel) that exhibited similar antics. It would die. Pull over, open the hood, everything looks normal and it would start right up. Hit the road and repeat. The problem? A slightly loose hood blanket that would get sucked into the air cleaner intake when you closed the hood and reached some level of intake vacuum.

 

No gas in oil. Checked that plus I think that would have happened back in Texas.

 

Suspected that too and don’t see anything floating at the bottom, but game plan is to run it almost dry to get a better look.

 

I was certain I had something similar, but it was a dirty filter, which as I said was only a problem under heavy load.

 

Well, let’s add some more to this after today. Didn’t get a chance to go for a drive yesterday. Willie is parked on level ground back in Texas and here in NM, but Saturday I backed him up on a slight incline to get him out of the way of the circle driveway. The incline was not anything big but you could see the slope to the front. So today I went to run an errand so jumped in and he just turned over and over but no start. But by now he had rolled down in the middle of the drive, blocking our main vehicle. So I popped the hood and no gas in the carb, but I could see it in the filter bulb. I took off the clamp to get a little gas in a cup to prime the carb. The amount left in the hose was minimal going from the pump IN back to the filter bulb, so I tilted the filter over and gas flowed freely. So from the tank, thru this filter bulb, it flowed fine. So that tells me no clogs in the tank or filter. I put it back together and poured some down the carb as I shorted across the solenoid. It tried to run each time and after a three attempts, he fired up and idled smoothly. Ran my errand with no issues. So normally, if I start him every 3-4 days max and he fires right up. The only time the carb dries out is if I let him sit for 10 days to 2 weeks.

This all gives me more of a move to install an electric pump, but that is really just doing a bandaid. But why would it dry/drain back or whatever so quickly. While I was initially thinking classic vapor lock, I’m really now leaning towards something in the fuel pump. Thoughts?

 

A tiny speck of crap in one of the check valves will mess up a fuel pump.

If you disconnect the line at the carb, you then could verify both static pressure and delivery volume. Both matter.

 

At Least you've found that your starv'n for Fuel........

 

Curious about your spark plugs, wonder if they color differently at altitude. I'd think if mixture richens, plugs would get darker.
Hopefully addressing your fuel pump issues will cure the stalling.

 

IMO most likely a dry bowl comes from evaporation rather than drain-back. The big Jeeps mostly have the 2100 or 2150 and dry bowl is almost universal after a week or two. An open element air cleaner makes it much worse. The factory air cleaners in the later vehicles shut to trap fuel bowl evaporation and send it to vapor recovery, and this makes dry bowl much less of an issue. Altitude will make it worse too, since the higher vapor pressure of the fuel speeds evaporation.