When was the Ford 400 vacuum connection made?
When was the Ford 400 vacuum connection made?
I did manage to find a vacuum diagram for the 400 dated for June 78, which was about a month before my car was built (as well as a couple 351M diagrams dated well after my car was built). But it includes a three-port PVS along with a pair of two-port switches. So, I’m not really sure it applies to its cousin.
What kind of vacuum switch does a Ford’78 use?
I drew up a diagram based on everything I had on hand. It uses a blue ported vacuum switch (fully switched at 95°F). It doesn’t have the vacuum circuit for overheating. I learned that requires a red ported vacuum switch (open at 235°F) with three ports to switch between ported vacuum and manifold vacuum. My engine doesn’t have one.
How many ports does a Ford 351M vacuum need?
I found something that says EGR Port vaccum from the carb needs to be run to a ported vacuum switch. When cold, it runs vacuum to the advance. Once it warms up enough, it switches over to the EGR. But, I went and double checked… This system sounds like it needs a three-port VPS, and both on my 351M are two-port.
Where are the vacuum ports on a Ford 2150?
Aside from the accessory connections stemming from the manifold on the firewall, there are only two things connected on the motor: EGR and vacuum advance. I think maybe I’m using the wrong vacuum ports for their control. Can anyone point me to the correct ports to use for them with the 2150? See if this helps.
I did manage to find a vacuum diagram for the 400 dated for June 78, which was about a month before my car was built (as well as a couple 351M diagrams dated well after my car was built). But it includes a three-port PVS along with a pair of two-port switches. So, I’m not really sure it applies to its cousin.
I drew up a diagram based on everything I had on hand. It uses a blue ported vacuum switch (fully switched at 95°F). It doesn’t have the vacuum circuit for overheating. I learned that requires a red ported vacuum switch (open at 235°F) with three ports to switch between ported vacuum and manifold vacuum. My engine doesn’t have one.
I found something that says EGR Port vaccum from the carb needs to be run to a ported vacuum switch. When cold, it runs vacuum to the advance. Once it warms up enough, it switches over to the EGR. But, I went and double checked… This system sounds like it needs a three-port VPS, and both on my 351M are two-port.
Aside from the accessory connections stemming from the manifold on the firewall, there are only two things connected on the motor: EGR and vacuum advance. I think maybe I’m using the wrong vacuum ports for their control. Can anyone point me to the correct ports to use for them with the 2150? See if this helps.
