Its not all that important.
When you apply vacuum to that line on the FPR it just raises fuel pressure a little bit to make up for the extra vacuum.
Only think difference is that one solenoid is gone on the ZE diagram, not sure what it does but Its probablly not to important.
Edit - You need the FPR but I dont think the solenoid is going to kill you to run without it. Majority of people with AFPR dont use that solenoid anyways.
When you apply vacuum to that line on the FPR it just raises fuel pressure a little bit to make up for the extra vacuum.
Only think difference is that one solenoid is gone on the ZE diagram, not sure what it does but Its probablly not to important.
Edit - You need the FPR but I dont think the solenoid is going to kill you to run without it. Majority of people with AFPR dont use that solenoid anyways.
