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Unread 12-20-2012, 12:46 PM   #1
tequilamike
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1991 YJ Wrangler 
 
Join Date: Mar 2012
Location: san leandro, ca
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New fuel pressure regulator running high 40 to 50 psi

Can i expect any problems?
Will this cause anyissues
It is new and measures 40 at idle and 50 psi with the vacume line unplugged.
I am running a stroker so some extra fuel is needed.
4.5 stroker in a 91 yj. with 24# injectors. mild cam. hi flow everything, borla header, 1 range cooler spark plugs, msd high energy stock replacement coil and larger wires 7mm i think. No sensor mods.
Any help would be very appriciated.
M


Last edited by tequilamike; 12-20-2012 at 12:56 PM..
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Unread 12-26-2012, 07:59 AM   #2
hotrod351
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i thought 40 - 50 was stock fuel pressure for injected engines. what doe your jeep call for.
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Unread 12-27-2012, 10:08 AM   #3
tequilamike
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Thanks for the reply.
Stock is 31 to 39 psi
M
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Unread 01-03-2013, 11:08 AM   #4
foggybottombob
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I have a 4.6 liter stroker in my XJ and your regulator is a bit high pressure. I got an adjustable regulator from Hesco for mine.
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Unread 01-04-2013, 09:19 AM   #5
tequilamike
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Thanks
I guess i wont worry about it.
I suspect it won't cause any problems.
The adjustable ones are expensive???
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Unread 01-04-2013, 09:37 AM   #6
JeeperDon
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If you are looking for stock pressure, can't you just get a replacement stock regulator?
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Unread 01-07-2013, 04:09 PM   #7
foggybottombob
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Stock pressure is not enough for 24 lb/hr injectors and 4.6 liter displacement. Your engine will be running rich with the setup you have now.
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Unread 01-07-2013, 04:56 PM   #8
tequilamike
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Running lean

I am running a stroker 4.5L so i need a little more pressure.
It was ordered as a stock regulator.
I think i need about 3 to 5 more psi than stock, and now have 5 over what i think i need.
I would think the o2 sensor would shorten the injector cycle to make 14. 7 AFR.
Also i am lean now 14.5 to 15.1 WOT
Which is another reason i am trying to get more fuel into it.
Running out of options.
Been thinking about an o2 sensor adjuster.
My nox is around 375ppm.
It was 513 before i put in a clooler plug to pass smog.
Might try a wider gap on my plug to retard timing a bit.
Might have that one backwards.
Thanks for your input.
M
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