fuel pressure regulator recommedations?
 

I have my top end tore down, and figure this would be a good time to upgrade my FPR.

I currently have the Crane, but Im not real happy with it. It only allows me to go down to around 33 PSI, and just wont go any lower.

Any suggestions?

I understand the Kirbans are good?

I had a Kirben fpr for a long time and it never gave me any problems. I never tried to go below 33 before though. My Aermotive fpr lets me go down past 33, but it is a fenderwall mounted one.

mach 1: you dont like your crane? why would you want to go below 33? the reason i ask is because im not sure if i should pay $15 for one from a guy i know.
if you could let me know a little about how it performas and your setup that would be great.

thanks,
adam

I just got the Kirban and I like it, plus it's only $75 and it's rebuildable. I had the Aeromotive and the BBK and sent 'em both back. The Aeromotive didn't fit in the stock location (too big, couldn't get the tb back on) and I'm not a big fan of BBK.

I just got a Kirban also, $89 from JD's Performance. It adjusts from 30 - 100 psi.

-Billy

Green9550,

jdsperformance has the kirban advertised for $65.00

Why did you pay $89.00?


Avbcon12,

I think my car might be running rich, so I wanted to try a lower pressure. The crane goes down to around 32 psi. I paid $50.00 for my crane a few years ago, and now they are $72.00 from summit. Its ok, I just like the billet ones better, and was looking for something with more room for adjustment. If you can score one for $15.00, I would go for it.

I have a '95 mustang. The price is different for 86-93 mustangs. That is the cheapest price I have seen.

-Billy

I can't get my Kirban to go lower than 42 with my 255lph intank pump and T-Rex.

Interesting, they say from 30 psi to 100 psi. Maybe thats with stock fuel flow?

I think so Mach1. Originally I thought my Kirban was bad, and then I started getting dropping fuel perssure. It turns out it was bad, but I have the adjustment screw all the way out and I can't get it low enough. Oh well I guess I can always increase my timing! :D

say what?

Was the kirban bad or wasnt it?

Heh Ooops didn't clarify enough. The Kirban went bad a couple of days later. :D But my new Kirban adjusts the same way, so I know it has to do with my fuel system.

Mach 1,

I don't believe you should need to go below 33 psi. I know we've hashed this out over and over again, but the computer's limitation of fuel control isn't how little it can provide but how much it can provide. Your biggest concern should be how high the fuel pressure can go.

When you set your fuel pressure, it should be with the engine off and the fuel pump test connector grounded to force the fuel pump to stay on. Set it to 39 psi. Remove the ground on the fuel pump test lead and start the engine with the fuel pressure gauge still hooked up. Has the pressure dropped significantly? If not, there may be a vacuum leak in the FPR preventing the diaphragm from moving. If it does, hook up a vacuum gauge to a vacuum source as then move the throttle lever. Does the fuel pressure go up as the vacuum drops? If not, there may something wrong with the FPR.

If you confirm that the FPR is working properly, I would then look at sensors. 02, ACT, ECT, and MAF in that order.

You may be on to something with the ACT sensor. I pulled my intake the other day, and the ACT sensor (that is the one in the lower intake, right? air charge temperature ?) didnt look good at all. Had large deposits of black crud all over it. I guess I will replace it when I put the motor back together. will be awhile, Im gonna pull my heads and port them.

I know my vacuum to the FPR is working, and I know the O2 and MAF should be good.

Yep, that's the ACT. I had a problem where I couldn't drive my car 20 feet without it stalling. It turned out that my ACT looked like what you described.