[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
(If I have any of this dead wrong, let me know, as it's the model I'm using in my own head...) The cold start valve is more akin to, on a carbed car, the driver pushing the gas pedal to the floor & releasing it in order to dump a squirt of raw gas from the accel pump. (Of course, on a carbed car, this also lets the fast idle cam and choke deploy into their "cold" positions.) The choke function -- delivering a richer mixture while running cold -- is handled by the cylinder head & intake air temp sensors telling the ecu that it's cold, so that the ecu can lengthen the duration of the injector pulses. The aux. air regulator pretty much does the job of a carb's fast idle cam. -Greg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org