motor is a b16a2, I have a few bolt on's and ITR cam's.

I use to have an aftermarket fuel rail on but took it off to pass bar.

I have a blox fpr, now when it was on the old fuel rail it was set to 42 psi.

I have the blox fpr on my stock fuel rail and the other day when I checked my plugs they showed it to be running a lean. how do you adjust the screw to richen it up and how do I know how much to turn it? I dont have a gauge anymore.

 

you need a gauge. you can try and go by reading your plugs but this can be difficult when done on the street.
i believe you would turn it clockwise to tighten, therefore tightening the spring inside the diaphragm to increase pressure

 

can you put a gauge on a stock fuel rail? if I tighten the spring is that richening it up?

 

anyone?

 

tightening the spring would richen it up. you can put a gauge on it. it can be done a few different ways. you can attach it to where the fuel line goes into the fuel filter, use fancy AN lines, tap the fuel rail for the proper threads or on the end of some fuel rails there is a plug. you could remove that plug and use its hole for the gauge

 

what would be a good starting point for adjusting? half turns, quarter turns?

 

You need a gauge to find out how much your adjustments are affecting the fuel pressure. No way around it.

 

aww see you had to go and pop my bubble

 

i would buy the gauge as well. take out the guessing. you arent going to gain power by changing it from stock

 

I have a gauge, not looking to increase power just tryin to richen it up because my plugs show im running lean

 

are you properly checking them, i.e, do a full throttle pull to redline and kill the motor IMMEDIATELY after, pull the plugs and check? cause if not the only thing pulling them is going to tell you is how it runs at idle, which should be lean anyway

 

hmm I didnt know that