ok new question.

[civicdx91]

how does a fuel pressure regulator work on a 1991 honda civicdx with d15b2 TBI? I would be helpfull if there are any pics or diagrams for this. Help? here is a pic to help you see what mine looks like.....

[bassist1088]

actually its pretty simple.. the smaller male end on the regulater is attached to a vacuum hose running to your intake manifold..flowing through this is pressure from the intake telling how much fuel you need at the time. the upper bigger male end is to do away with excessive fuel not needed at the time