Re: 640 running too rich

Posted by Tim Cole On 2022/9/26 11:23:41

I'm sorry, on that unit I believe it is internal. Look for a passage above the throttle plate. It acts essentially as an idle jet and meters fuel into the engine that would otherwise collect below the throttle causing the motor to gradually go super rich at idle.

So if your car starts out okay and then loads up at idle, maybe that is your problem.