Automobile(s): White Diamond '03 DHS (with DTS floor shift)
Re: In what order are these to be performed? AC and ISC
OK, in that case disregard the above. You will have to remove the (functional) manifold cover. Inside is where you'll find the fuel rail and FPR. Since the FPR is subjected to manifold vacuum, there is no need for a vacuum hose. The nipple will simply be exposed. ( I know what you're thinking). Go to KOEO (key on, engine off), but DO NOT CRANK THE ENGINE. KOEO will energize the fuel pump and pressurize the system. Just like above, look for fuel leaking from the nipple.
Be sure to use the proper torque specs when reinstalling the manifold cover. It does not get tightened real hard. It has to be able to lift in order to vent the manifold in the event of a manifold over pressurization (backfire).