In the last week alone i have had two cossies in with nice shiney ebay purchased fuel pressure regulators fitted,

interestingly both cars also had seriously dangerous afr on boost.

the answer.The fuel pressure regs do not correctly increase pressure when boost is applied to them!

this is becomming more and more common with the spurt of cheap regs being sold for peanuts on ebay, so i thought i would give you a heads up which may save at least one of you an engine

they dont work guys, buy the real deal, they are cheap for good reason!