The EF-AU intake uses mainfold vacuum to change runner length of the intake at (I think) 3200 rpm. Under that revs, the runners are long to use the inertia of the air to pack more into the cylinders. The vacuum is controlled by the EEC but I don't exactly know how... some sort of solenoid I guess.
So would I have to source a vacum solenoid from the wreckers or ford, I know what they are, I used to work at city ford and had to move them alot, when i worked on the cars. By the way how much would you charge to wire this up.
IF YOU DONT TRY IT YOU WONT KNOW.
The way that original vac switch operates is a bit odd too (IMO) - ie. it actually needs to be energised for vac to be supplied to the manifold actuator (ie. for long path) and to cut the vac supply and vent the vacuum from the actuator so it can move to short path, the valve is de-energised.
That all seems odd to me because I'd have thought it more sensible to make it powered on for the short path - that way it'd be off the vast majority of the time.
I've found tho - by hooking my valve up to a variable power supply and setting the supply to 12v - that it draws very little current and doesn't get hot. Still seems an odd way that Ford have chosen to do it.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.