Jim;
I would like to straighten out the confusion on which side of the intercooler you should be using.
1; Because your not making more HHO and pumping it in under pressure then you must let it be sucked in on the VACUUM side(which is where you currently have it).
2; You don't usually want to have to go thru the cooler or long distances with HHO, but you don't have that option with your vehicle as the pressure would back feed your reactors and resevior.
Sorry for the earlier confusion.
Its done right or its not done !
Hail HHO.