what if you were to detach the vacuum line to the FPR & drive the car this way for a while? what would happen? how would it affect performance? my friend has a 90lx & he had his vacuum removed for some time. he bought his car & had it for about a year before he decided to install an AFPR wich is when he noticed the line missing off the top. he had a fuel pressure guage underhood & saw it read 38 psi often at idle when he looked under there not realizing it should only read this way with the line disconnected. we followed my vacuum line on my stang to see where it came from & put a new one on his in the same mannor. his line was totally gone altogether! he asked me how this affected his car and did he hurt anything but i wasnt sure of the answer, so i need help answering this one for him.