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- #21
smithjw
Well-known member
OK. How about looking at something unrelated to the fuel system for a minute. Before all this started, I was checking out the heat riser. There was a vacuum line that turns into a steel line and goes into an actuator that controls whether the heat riser valve is opened or closed. I had read during the winter that the valve sometimes can get rusty and seize,so I put a some p-blaster on it to try and keep it free. I then worked it back and forth by pushing the actuator arm. Seemed like it freed up some, so I was not concerned. Now have gone back and looked at this again. Seems that the steel vacuum line was disconnected from the actuator by a previous owner. My question is, when this is disconnected, the actuator arm seems to be at full extension. Is this opened or closed? Can my idle problem be attributed to the valve being either fully open or fully closed? I am thinking that when I first started to play with this it was stuck in an in between position, and when I freed it up, it either went fully closed or fully opened.