First off, I'll admit i dont know much about carbs. On to the problem


Crank it and with it idling, it'll run and not die.

You can punch it and it'll get up in the high RPMs just fine, But, If you give it any certain amount of gas, and keep it STEADY. The rpms will react accordingly, then theyll gradually fall down and the engine will die (all within about 3 to 4 seconds)

When it starts to die, at anytime u can punch it and itll rev right up with no choking, no surging, no problems.

Feels like ur gradually letting off the gas and when it gets to idle speed it just dies (know thats not what its doing, just trying to explain best i can what it feels like)

 

are you letting the car warm up? what is your torque converter stall? what size carb/type with what engine...give us some more detail

 

Yeah does it when its cold and after its warm.

Manual Transmission
LG4 305
4bbl qjet

Thanks in advance

 

Computer controlled?

 

Yes sir, Computer controlled qjet (Sorry, i forgot to mention that)

 

Any SES light when this happens?

Is the accelerator pump squirting?

Can you hear the mixture control solenoid clicking?

 

No SES
MCS is clicking

And to be honest, Not too sure how to check if the accelerator pump is pumping

 

my beetle did this when it had a bad internal vacuum leak.