When I used to fly many yrs ago, we lost the vacuum pump in our Pa-28 one evening heading to a nearby field that had a restaurant there and had to turn back and go home half way there on account of the fact we would've been flying home from supper in the dark, and that's a no-go w/o a functioning attitude indicator under vfr flight rules. Since it was CAVU vfr and still daylight on the enroute it was a non-event and we returned safely home with daylight to spare. At least on the small single engine piston a/c, vacuum pump failure wasn't unheard of.

So now vacuum pumps are necessary on turbo direct injection gasoline vehicles and my 2.7 has what appears to be a mechanically driven one (hope so, hope not electric) on rear of the driver side cylinder bank. Are these pumps pretty bullet proof?

 

yep, not much goes wrong with them

 

Correct me if I am wrong but since 2017 I think the F150 uses a venturi system to produce vacuum instead of an actual mechanical or electric pump.

 

nope, they still have a pump

 

Second gen 3.5's only

 

I was thinking the 2017.5 was a second generation 3.5 My bad.

 

My old company makes the main plastic components for that setup, and Dayco puts the assembly together and ships it to Ford. Based on my experiences, I'll stick with my mechanical pump on the backside of the motor.

 

2017 3.5 Eco is the 2nd gen. No vacuum pump on the back of the head. The ActiVac system is very simple, I believe it uses manifold pressure when in boost to maintain the brakebooster vacuum. I look every so often to get more info on it, but it appears Ford and Dayco want to keep things secret from us dirt clods.

 

Have you read this one?
http://magazine.todaysmotorvehicles....out-pumps.aspx

 

Thanks King, yes, I had seen that. I'd like to see a flow diagram and cutaway of it too.