IMZman

iTrader: (1)

Service Manual, F-10, upper right corner of the Vacuum Hose Routing Diagram; Pressure solenoid has a vac line coming off with a "gas filter". Is this just a check valve or something special? Arrow shows it is a one-way on the filter...but it is open both ways.

Question: Would one of Dale Clark's VITON check valves work in this application?

Mil grasias,

mad_7tist

are you talking about the MAP sensor on the driver's side firewall? that is not a check valve but a filter. keeps oil particles etc from getting to the sensor.

IMZman

iTrader: (1)

That is probably it. It is the small (box of matches size) black sensor mounted to the firewall. Now that I study it, a filter would make sense. I was whipped after tearing everything off the engine and had check valve on the brain. Thinking about it, filters have directional arrows too.

But just to make sure...is it just a filter (air moves through both ends) or is it supposed to have a "one way" valve type feature also? I do not see a "test" for it in the manual, so I could assume it is just a filter...but I hate assuming anything.

Mahjik

iTrader: (1)

It's a filter. It flows both ways but has a "filtration direction".

IRPerformance

iTrader: (41)

Doesn't matter which way it goes but most cars I see have the arrow facing the intake manifold. The map sensor will eventually go bad without it.

dgeesaman

iTrader: (7)

Exactly. The arrow is there so that the dirty and clean side of the filter don't get switched.