[Richard L]

It is not a good idea to disassembe the FAV because the lift of the internal plunger is caliabrated individually due to manfacturing tolerance. Without the proper setup it is impossible to do it properly, flow linearity vs PWM signal cannot be guaranteed.

Did you mark the original position of the end bolt?

Loctitle used on the FAV is recommended by loctitle (company) for methanol compatibility. Most loctile is compatible in any case but we can disclose the type we used as it is a sensirtive infomartion. We have used the same loctile since 2002 and has very liable.

We could have made the top bolt with o-ring seal instes dof loctite seal but vlave specificiations and repeatibility will change over time.

The only time the valve can stick close is the the EPDM runner seat. It is very sensitive to hydrocarbon contamination. It swells up to occupy the gap so no flow can go past.

If you did not find any debris inside the valve, check the EPDM seal. It should be dead flat.