YJ 2.5l 4cyl TBI fuel pump reccomendations?

[idahoyj]

After seeing another similar thread, I decided to tap the vast RME knowledge base for help finding a fuel pump for my Jeep.
I have a 1989 Wrangler with 2.5l. It has an aftermarket fuel cell and an externat fuel pump. When i bought the Jeep it had a Holley red pump and the Jeep ran OK. But the pump started leaking and at the same time the Jeep started running rough. I replaced the pump with a cheap Mr Gasket pump but it didnt help the rough running. Aftet much frustration a friend of mine is helping me figure this thing out. We did a pressure test on the fuel line and I only had 4psi. The Jeep is supposed to jave 14 to 16psi. I put both the new pump and old pump in line at the same time and got up to 12 psi. Now the jeep runs much better, but I really dont want to keep it this way.
So, does anyone know of an external fuel pump that makes 14-16 psi? I found a few universal ones but they are spendy.
Im looking to spend under $75 if poss.
Thanks in advance!

 

[mesha]

would higher pressure be a bad thing? If not I bought a cheap pump on ebay rated at 70psi and it works great on my 4.3 vortec.

 

[N-Smooth]

If it has a regulator on the fuel rail and a return line you can run higher pressure. I run an e2000 with my fuel cell because it came on a lot of old fords and every part store has them. I've been pleased with it so far

 

[B2-Bomber]

If it has a regulator on the fuel rail and a return line you can run higher pressure. I run an e2000 with my fuel cell because it came on a lot of old fords and every part store has them. I've been pleased with it so far

^^this is the exact same pump that I was clicking into this thread to suggest

I run it on my gm TBI system, as well as a buddy's rig that I adapted it onto. the regulator sends the excess fuel back to the tank. so even though the max pressure is rated to be 90psi, it has fed my tbi for 5 years, I even used it as a daily driver for 3 of those 5 years.

 

[skippy]

I would buy the correct PSI pump I have seen fuel regulators fail and when they do you have fuel going everywhere with a very very high chance of fire. Fuel regulators are designed to regulate the amount the fuel that goes into the TB but that regulator wasnt designed to hold 90 PSI. The fuel system is not somewhere to use cheap parts.

If this was a MPI engine 90 PSI is not an issue, I have alot of experience with the YJ 2.5 and I say buy the right pump. Why not modify your fuel cell to accept the stock in tank pump?

 

[B2-Bomber]

FPRs are literally a valve with diaphragm and a spring. regardless of the pumps max capability, if the valve to the return line is opened maintaining a lower pressure than the pump's max. the FPR sees no more pressure, load, stress, etc, than it would with any other pump. the pressure it sees is literally the same pressure 12psi pressure that the rest of the system sees.

if you want to look at a pump's rating that could cause damage to an FPR in theory, the volume not the pressure would be the source of failure. this would be because in theory the pump could supply a higher volume of fuel, than the regulator has the ability to pass through it, at which point, in theory the pressure would rise because even if the FPR stayed wide-open the fuel couldn't all get through the return-hole fast enough, thus rupturing the diaphragm

if a you are worried, look at the "GPH" not the "PSI"
*EDIT, which I did, according to O'reilly's website, a 1995 2.5l wrangler shows a 45gph replacement pump. and a 1989 ford calls for a 33gph replacement pump. Which means that at 12psi the ford pump is less likely to damage the 2.5l FPR, than the stock pump. this also explains why I have had such great success with it on 12 psi systems

and for the record, the airtex pump for the ford, has a max pressure of 130psi, yet the ford's rail runs at 40psi. so even stock vehicles run pumps that have a "max pressure" that is 90 psi higher than the fuel rail runs at

if, and when an fpr fails, it is not because of the pump. and if, it were to fail it would have "risk of fire" either way

 

[skippy]

FPRs are literally a valve with diaphragm and a spring. regardless of the pumps max capability, if the valve to the return line is opened maintaining a lower pressure than the pump's max. the FPR sees no more pressure, load, stress, etc, than it would with any other pump. the pressure it sees is literally the same pressure 12psi pressure that the rest of the system sees.

if you want to look at a pump's rating that could cause damage to an FPR in theory, the volume not the pressure would be the source of failure. this would be because in theory the pump could supply a higher volume of fuel, than the regulator has the ability to pass through it, at which point, in theory the pressure would rise because even if the FPR stayed wide-open the fuel couldn't all get through the return-hole fast enough, thus rupturing the diaphragm

if a you are worried, look at the "GPH" not the "PSI"

if, and when an fpr fails, it is not because of the pump. and if, it were to fail it would have "risk of fire" either way

So your saying a regulator that is designed to regulate 18PSi of pressure is the exact same as the regulator designed to regulate 90PSi of pressure....

That diaphragm will tear being pushed to those extremes....

The factory regulator on a YJ will not bypass enough pressure and cause you to push fuel through the TB and over fuel the crap out of it

 

[B2-Bomber]

So your saying a regulator that is designed to regulate 18PSi of pressure is the exact same as the regulator designed to regulate 90PSi of pressure....

that's not at all what I am saying so **eyes rolling emoticon right back at you buddy

but what I am saying is that, an 18psi regulator will regulate 18psi regardless of the "max pressure" of the pump. so long as the volume isn't more than the regulator can bypass

this is fact. you don't seem to get it

you quoted me before I added the fact that the stock ford FPR uses a pump that has a max pressure that is 325% of its operating pressure from the factory
but according to you, the diaphragm should "tear"

hurry, call ford warn their engineers of their mistake 25 years ago **rolls eyes

 

[B2-Bomber]

oh, and I just checked o'reilly's website , the replacement pump for a TIB 2.5l wrangler has a max pressure of 69 psi. that is 575% of 12psi you may want to conference call jeep while you are warning ford

http://www.oreillyauto.com/site/c/d...ck=Search_C0401_1184712_-1&pt=C0401&ppt=C0025

 

[idahoyj]

I ended up buying a generic inline pump. $70+/-.
It is the correct psi, but I think it would have been better to get a little more pressure or volume and let the regulator do its job. It's running rich 75% of the time but high rpm's it feels like it runs out of fuel.

I have the RCI 2161 tank currently, and it had a Holley pump when I bought the project. I'm installing a GenRight stretch tank with a factory pump when I do the Unlimited stretch part of my build. I was just looking for an inexpensive pump to get me back on the trail.

 

[B2-Bomber]

I was just looking for an inexpensive pump to get me back on the trail.

I run the stock in-line pump from a 1988-1989 ford truck. Since they are on the frame rail, they are super easy to pull, so if in a financial bind you could go buy one from a you-pull-it JY for like $20.00 I bet.

new they are like $90.00