Whatever the answer to whether the pressure changes or not, the ultimate effect is that the wrong WUR, working with (or against) the Lambda system, would produce bad running, right?
Quote:
Originally Posted by tirwin
Bob,
My thinking was that as duty cycle increases towards 100%, that is adding more fuel so the mixture gets richer. The FV valve is just an on/off switch and the ECU tells it how often to open and close. My simple analogy was to think of a beer keg. You pump the tap to build pressure. That's the WUR and the FD. The FV is the spout. And the ECU is me deciding to pour a big beer in my red solo cup so I decide how long the spout is open. And I guess to continue the analogy the O2 sensor is my friend that's telling me to slow down the pour because I'm committing a party foul by making too much foam.
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But what does the FV switch turn on and off? The injectors run all the time (as long as they have more than their opening pressure), so not them. The one frequency valve works on all six injector outputs. So it has to act either before or inside the fuel distributor, right?
Quote:
Originally Posted by Bob Kontak
I'll buy that but I was pretty darned close. Thanks!! You da Man.
From the CIS primer.
This component is used only on the engines with Lambda control. The duty cycle of pulses sent to the device by the Lambda control box varies the pressure in the lower chambers of the fuel distributor, which controls the fuel mixture.
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I think this is more correct. Let me research.