Flooding I think

[Jimb3893]

Hi folks. I own a 1971 M38A1 which I've owned since 1988. It doesn't run more than maybe 25 hrs per year. Last year I replaced the fuel pump with an after market pump. I couldn't find a kit for the original pump at a reasonable price. The new pump was sold to me by a reputable supplier in the mid west.
The jeep starts fine and runs well unless I stop and let it idle for a few minutes. Then it promptly stalls and is very difficult to start again. Seems like it's flooded and belches black smoke when it does start.
I took the carb apart and cleaned it this spring. That didn't help.
I'm wondering if the new pump has too much pressure for the carb.
Can anyone tell me what the pump pressure should be and if there is a way to regulate it?

Many Thanks

Jim Baker

 

[JGBallew]

There is (was) an accessory fuel pressure regulator out there, had one on a 66 Nissan Patrol. But it's a bright chromed gizmo, and I think you need to look at the carb again.

"Readjust the carb", is my first suggestion.

if that doesn't do it, pull the carb and check the float level. Then all gaskets. When the gaskets dry out, you can have tiny leaks. Also check the idle mixture screw for a "ring" or gouging to it's taper.

You should be able to turn that idle mixture screw in when the engine is idling and cause the mill to stall.

Then check the crankcase vent system, for a stuck valve.


I'll try and get you a refrence pressure ASAP, have to look it up to be sure.

Okay, should be 4~5 PSI at cranking.