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Message: [QUOTE="Tiha, post: 1563570, member: 33189"] Okay, to update and share what info I can. VCV, volume control valve, or valve on top of the pump. Seems like half these things go by different names. Anyway, KOEO I get no noise, rattle, vibrations, buzz, anything out of it like I read I should. So don't expect that. Did test that I have voltage to it. Didn't check more than that because I am focused on having fuel flow only. That doesn't account for the changing duty cycle required by the PCM. To test it, it is similar to the PCV. Set up a return line from the PCV on the left rail, KOEO command the fuel pump on, and PCV off. Or just turn the key on and it will run for 30 seconds or whatever. Now you are supposed to command the VCV to highest duty cycle and observe flow, and then lowest duty cycle and observe flow. I didn't get this far, because I saw flow. That is all I needed to know. But I "think" you can just unplug the VCV and flow should stop. Not sure about that. We are talking about flow out of the return line at the Pressure control valve on the left rail. Just for kicks I did pull the VCV apart and verified the plunger was not stuck. Seems like it would be really easy to get metal shavings in there or dirty. Not recommend unless you are desperate. [ATTACH type="full"]187107[/ATTACH][ATTACH type="full"]187108[/ATTACH][ATTACH type="full"]187109[/ATTACH] [/QUOTE]

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