Gerald Morris
Senior Member
Greetings Moparians! Well, I now am getting my karmic due for boasting of my cheap eBay buy last Fall. The cheap Stromberg served right admirably until temperatures went over 90 F just the last week. Now, any time the engine is warmed up, once shut down, restarting is problematic and I suspect w all the un-burned gasoline wasted, dangerous.
A COLD start goes FINE! She bumps right over nice, and I'm off. Acceleration is good (all things considered) and that first run goes well. But a WARM restart requires much feathering the gas pedal from closed to WOT until the motor "catches" and runs. Acceleration is very poor under this circumstance. ONLY after the engine cools below 130 F will a normal start be possible then.
I've checked the clearance of the bowl vent valve and twiddled it a bit to alleviate the symptoms some, using a 1/16" drill bit for my gauge. I've bent the pump rod slightly to achieve the specified clearance the first time, then after looking at the FSM, bent the little arm raised by the pump rod in curb idle position. I thought a couple weeks ago, during our first warm spell, that I had solved the problem, but today it came back in a big way, and no amount of bowl vent valve twiddling had much effect.
My thought is to rebuild a carb w the Hygrade kit I purchased last summer for this sort of exigency. I have 2 cores in addition to whats under the hood. The original carb would be my best candidate for a rebuild. I probably will pay a local old carburetor guru his C-note to do the job well, as I depend on Mathilda daily.
I'm curious as to what causes the effects I'm suffering from. If any of you More Exalted Moparians than my humble self have an idea, I would be grateful. The FSM symptom table isn't too helpful.
Note: I use a manual choke, which serves me very well in cold weather. The old heat well rod is tied well away from anything and the vac pulloff is completely disconnected. The carb gets all the air it needs down the horn, through the venturi and onward. I think maybe there is some little piston sticking, or the float. Am I deluded or besotted w all the fumes from the day?
A COLD start goes FINE! She bumps right over nice, and I'm off. Acceleration is good (all things considered) and that first run goes well. But a WARM restart requires much feathering the gas pedal from closed to WOT until the motor "catches" and runs. Acceleration is very poor under this circumstance. ONLY after the engine cools below 130 F will a normal start be possible then.
I've checked the clearance of the bowl vent valve and twiddled it a bit to alleviate the symptoms some, using a 1/16" drill bit for my gauge. I've bent the pump rod slightly to achieve the specified clearance the first time, then after looking at the FSM, bent the little arm raised by the pump rod in curb idle position. I thought a couple weeks ago, during our first warm spell, that I had solved the problem, but today it came back in a big way, and no amount of bowl vent valve twiddling had much effect.
My thought is to rebuild a carb w the Hygrade kit I purchased last summer for this sort of exigency. I have 2 cores in addition to whats under the hood. The original carb would be my best candidate for a rebuild. I probably will pay a local old carburetor guru his C-note to do the job well, as I depend on Mathilda daily.
I'm curious as to what causes the effects I'm suffering from. If any of you More Exalted Moparians than my humble self have an idea, I would be grateful. The FSM symptom table isn't too helpful.
Note: I use a manual choke, which serves me very well in cold weather. The old heat well rod is tied well away from anything and the vac pulloff is completely disconnected. The carb gets all the air it needs down the horn, through the venturi and onward. I think maybe there is some little piston sticking, or the float. Am I deluded or besotted w all the fumes from the day?