Quick Carb Question

[rcb]

i have a quick carb question. i been trying to figure out how to solve my idling prob. can't get it below 1000 rpm. so my question, can the float level throw the idle off this much? the fuel level is a little more than half way in the sight glass. thanks

 

[Pin_Head]

No on the float level. I assume you mean that it stalls below 1K. There is probably something wrong with your idle fuel circuit: fuel cut off solenoid not opening, plugged passage or outlet port.

 

[65swb45]

No on the float level. I assume you mean that it stalls below 1K. There is probably something wrong with your idle fuel circuit: fuel cut off solenoid not opening, plugged passage or outlet port.

What he said. Below 1000 rpm, you should be able to get the truck to run off the idle circuit exclusively. When working properly, you won't be able to see any gas flowing out of the carb venturi into the engine. Not even a dribble.

Other causes for failure to hold a low idle would be a vacuum leak, burned, sticking or misadjusted valve, bad ignition timing and or dwell. Keep in mind the carb is often the victim, not the culprit.

 

[PabloCruise]

Unless he means, he physically cannot get it to go below 1000 RPM.

What rig are we talking about here? What year, engine, etc...

Mine won't idle down cause my throttle positioning solenoid won't let go.

'78 40w/ 2F

 

[rcb]

73 f-engine stock carb i believe my idle solenoid works because it clicks when the key turns on. thanks for all the suggestions

 

[Pin_Head]

What was the problem? The engine stalls when you try to adjust the speed lower or that you turn the idle screw and the speed doesn't drop? It would be two completely different problems.

 

[rcb]

sorry. the engine stalls when i try to lower the idle

 

[65swb45]

sorry. the engine stalls when i try to lower the idle

Which begs the question, can you see gas dribbling down inside the carb at that speed?

 

[Poser]

Vaccume leak.....


Massive vaccume leak.