newbie question
 

ive just installed a 1s aquamist setup on my 18t vw, however , under vacuum the system is weeping into the cylinders causing a misfire. what have i done wrong?

This is an easy one to solve.

You need to install an inline checkvalve 806-249.

so my install locations arent too high/low then?

The location is not the problem it is the location of the jet. If there is vacuum present, it will draw water through the pump.

Or

You can relocate the water jet in on the air filter side of the throttle.