Another Mikuni question

[Cartman2112]

Thanks, I'll check all of the hoses again. The transmission linkage should all be mechanical. Could the PCV valve or the charcoal canister be causing issues. I know they haven't been looked at in years.

A little background: this truck sat for about 5 years after my Dad quit driving. I got it running pretty good but am still going through everything part by part to try to get in running as well as I can without having to do any major overhauls. I do know that the number four cylinder is oil-fouling the plug. Probably the rings but I can even try to tackle that yet!!!

[xboxrox]

Thanks, I'll check all of the hoses again. The transmission linkage should all be mechanical. Could the PCV valve or the charcoal canister be causing issues. I know they haven't been looked at in years.

A little background: this truck sat for about 5 years after my Dad quit driving. I got it running pretty good but am still going through everything part by part to try to get in running as well as I can without having to do any major overhauls. I do know that the number four cylinder is oil-fouling the plug. Probably the rings but I can even try to tackle that yet!!!

PVC VALVE ~ should be clean & allow air flow in one direction OUT away from the crankcase (if plugged it can cause the crankshaft front seal to leak) engine will idle smoother with a clean PVC valve ~

BVV ~ carburetor bowl vent valve does have a diaphragm ~ I replaced the BVV in my Mikuni carb ~ not sure if would be the cause of engine stumble but it could cause the truck to smell gasoline - ish and fuel foul stinky pollution ~ it's operated by an electromagnet attached to the carburetor ~ since your truck otherwise runs strong I will guess the carburetor float adjustment is correct & the needle seat does not leak ~

LOOK HERE: http://www.mightyram50.net/vbulletin...hp?albumid=615 <----- BVV BOWL VENT VALVE INFO