S13 Slide
Driver
easy way to check the fuel regulator is to unplug the vac line to it, if it leaks fuel the regulator is bad, but whent hey go bad then they just run at max fuel pressure, those ussually dont go bad at all, if anything you would smell a strong fuel smell from the exahust.
I still think you cam timing is off, is your timing chain making noise?
I still think you cam timing is off, is your timing chain making noise?