[Superman]

Steve, I think you are talking about the air flow sensor plate, and I don't know how moving it would help anything, unless it's just a matter of loosening it up. Sometimes, CIS systems can act funny because the rest position of the sensor plate is not exactly correct. But don't get ahead of yourself. That comes later in the troubleshooting process.

With your warm start problem, there is virtually no question that your residual fuel pressure is leaking down. Installing the extra check valve is pretty easy I'm sure, but I thought I heard that there is an elbow piece that needs to go in at the same time. For reasons of physical room, I'd guess. Perhaps a search on the check valve install process would help you.

Once that is done, then see if the problem persists. If so, then we find something else as a cause. A CIS pressure tester is a necessary thing, for troubleshooting CIS systems. I saw one in JC Whitney, and Pelican probably sells them as well. Hot start problems like you describe are related to residual fuel pressure, but this problem usually does not affect cold starts. Still, I'm recommending that the residual fuel pressure problem be fixed before we accuse your engine of other misbehaviors.