Sorry to resurect, but did this today and got a humming/buzz from the evaporative system purge valve, that small capsule located in front of the intake manifold, by the back of the alternator.
Did anybody else get that?
Also, I did not think the pressure rised above 2 PSI.
What I did not understand is how do you guys prevent air from leaking past the throttle body. Depending where the engine stopped, valves could be open and the air could just end in the exhaust, no?
Please help me out.