1G fuel pressure regulator questions

[Zultane]

Hey all, I just bought a 90gsx. I have a few questions, as some of these mods I'm unfamiliar with.

It has a 'aeromotive' fuel pressure regulator in it. I believe I am running really really rich. The gauge says I'm pushing 55psi. That seems irregularly high to me... coincidentally, I puff outblack smoke, and I it doesn't idle very great. My AFR reads in the neighborhood of 15, but fluctuates.

1. Am I supposed to run that much fuel?
2. If no, how do I adjust it?

The injectors seem to be aftermarket, though I don't know what brand, or how big. It's a 14b turbo.

I do not have dsmlink, yet.

I have other issues I'm dealing with, essentially, I'm fixing another guys screw ups. Assistance would be appreciated, thanks in advance.

 

[LarryJoe]

Is this a wideband gauge or just a cheap air fuel ratio one? 15 at idle is about right so you shouldn't be puffing out unburnt fuel.

 

[Zultane]

I just asked my girlfriend, she was the one behind me. It wasn't smoking while I'm idling. Just when I take off, or shift. In her words 'a big mass of stinky black smoke that gives me a headache'

As for the gauge, it says "Aem air/fuel ratio" I don't know how to tell if it's wideband or not. Pillar gauges are new to me. But I know mathematically, 14.7 is the "perfect" AFR.

Injectors seem aftermarket, they have a relatively new sticker on them. It looks like it says "rs" on them, but that's all I can see without physically taking them out.

 

[pikul21gsx]

Whats does the gauge on the fpr reads at idle? Anyways you can adjust the pressure, without the vacum hose connected it should be set at 37psi since its a 1G

 

[Zultane]

How do i adjust the fuel pressure on it? I've always had electronic controls for all that. Manual fuel regulators are new to me.

 

[habitatguy187]

With the car running pull off the vacuum hose off the fpr and lower it to 37.5 psi. 43 if you have an automatic.

 

[Zultane]

With the car running pull off the vacuum hose off the fpr and lower it to 37.5 psi. 43 if you have an automatic.

But how do I adjust it?

 

[99gst_racer]

But how do I adjust it?

You adjust it via the stud on the top. Clockwise turns gain pressure and counterclockwise turns reduce pressure. And as mentioned, make adjustments to it with the vacuum hose unplugged from the regulator.

 

[miguelmcv]

Go to the Fuel regulator, On top of it has a stud with a nut on it, Loose the Nut, remove the vacuum line and turn the stud, you will see the gauge to go low or high (depends on which way you turn the stud), Do that till you get the right PSI.

 

[Zultane]

Cool thanks guys, I'll do that today after work. I was pretty sure it was that nut. But I didn't wanna mess anything up.