2001 Jeep Wrangler Fuel regulator?

wolfen1086 · 09-13-2009, 12:11 PM

my Jeep is a 2001, 2.5 FI. everywhere I look on teh internet shows the fuel rail that goes to the injectors as the fuel regulator, since its built into the rail, I've been around for 46 years and I know for a fact that a fuel regulator should have a return line hooked up to it somewhere, alas theres only one line hooked up anywhere on this thing, and thats teh line coming from the tank supplying fuel to the rail.
Anybody out there know what this thing really is?

**octaneman** · 09-13-2009, 09:10 PM

Wolfen1086

The fuel regulator has 2 O-rings on it (smaller O-ring the input, the larger O-ring the return) which hooks up to the rail, the regulator itself has an opening on the bottom which returns fuel back to the line.

wolfen1086 · 09-14-2009, 02:41 PM

hmmmm, know what, that part there is nowhere in my fuel system at all, the part on the end of the fuel rail is welded to it from the factory, so it must be a damper or some kind, None of teh parts counter guys, ad "experts" at the dealer can tell me what this thing is, all they can tel me is the whole rail is $110 and that piece comes with it already permanently attached .

**octaneman** · 09-15-2009, 01:55 AM

Can you post a clear picture of the component and its location on the fuel rail ?

**SABL** · 09-15-2009, 08:25 AM

I'm showing a regulator in the parts list, also. I also see a TBI gasket on the list. Perhaps the regulator pertains to the throttle body injection and not the Multi-port system. I will see if I can locate my Jeep manual and take a peek at the fuel systems.

wolfen1086 · 09-15-2009, 02:58 PM

Quote:

Originally Posted by octaneman

Can you post a clear picture of the component and its location on the fuel rail ?

I'll try to fine one, I really don't want to take the air cleaner tubing off just for a picture :) But I know there has got to be a picture somewhere if its on 2001 Jeeps.

wolfen1086 · 09-15-2009, 04:01 PM

OK I searched the entire internet ( found both ends too) I can't find this part anywhere, BUT I did find them for sale on Ebay
http://cgi.ebay.com/ebaymotors/ws/eB...n%3D3%26ps%3D5

Thats about what it looks like only where teh rail is smashed to bolt it on on mine it isn't

**wrench97** · 09-15-2009, 04:12 PM

That because it's also the filter located on top of the fuel pump.

Quote:

FUEL FILTER/FUEL PRESSURE REGULATOR
DESCRIPTION
The combination fuel filter and fuel pressure regulator
is located on the top of fuel pump module (Fig.
1).
OPERATION
A combination fuel filter and fuel pressure regulator
is used on all engines. A separate frame mounted
fuel filter is not used with any engine.
Fuel Pressure Regulator Operation: The pressure
regulator is a mechanical device that is not controlled
by engine vacuum or the Powertrain Control
Module (PCM).
The regulator is calibrated to maintain fuel system
operating pressure of approximately 339 kPa 6 34
kPa (49.2 psi 6 5 psi) at the fuel injectors. It contains
a diaphragm, calibrated springs and a fuel
return valve. The internal fuel filter is also part of
the assembly.
Fuel is supplied to the filter/regulator by the electric
fuel pump through an opening tube at the bottom
of filter/regulator (Fig. 3).
The regulator acts as a check valve to maintain
some fuel pressure when the engine is not operating.
This will help to start the engine. A second check
valve is located at the outlet end of the electric fuel
pump. Refer to Fuel Pump—Description and

wolfen1086 · 09-15-2009, 05:47 PM

Ok that [art I DO have, I remember it from changing the fuel pump when it went, thanks Wrench, at least now I know where the fuel regulator is, now to find out *** that thing on the rail is, I know I need fuel injectors the ones on it now have 75K on em, but the rail is $110, so if I don't need a new one why change it right?

**wrench97** · 09-16-2009, 01:35 AM

Try cleaning the injectors with a pressurized cleaning kit. Most of the time it works.
I'll poke around later to see if I can find out what it is.

**wrench97** · 09-16-2009, 12:19 PM

Here's what I found on it, it looks to me like it's just a spring loaded diaphragm to help keep the fuel pressure steady and keep the pump pulsations to a minimum. The testing section makes no mention of testing the damper only that the fuel pressure should be 49.2 Psi +/- 5 Psi.

wolfen1086 · 09-16-2009, 02:26 PM

Thats the best answer I have heard from anybody, I even emailed Jeep and they said its either a regulator or a damper, but between the other picture you posted and this one I now know that its nothing more than a damper, thanks wrench. I will change the injector instead of just cleaning them, they have slight rust on the outside, and I want to be rid of that before it turns into major rust. I treated the fuel rail with rust converter, but I was kinda scared to treat the injectors in case I dripped the stuff onto the nozzle openings.

**wrench97** · 09-16-2009, 03:05 PM

I haven't priced them lately but they were about $48 cost a couple of years ago.

wolfen1086 · 09-16-2009, 03:33 PM

I priced both Injectors and fuel rail here localy at a parts store, the injectors are %58. 95 each and the fuel rail is $110.45. But thats just here in Va Beach, I can get them online cheaper. But the question is, do I trust the internet enough to order those type of parts and actually get that exact replacement part. The credit card isn't an issue, I have security that the govt can't break for that :).

**wrench97** · 09-16-2009, 03:37 PM

Big thing with me is the brand Bosh & Denso are probably the best.

wolfen1086 · 09-17-2009, 03:03 PM

So can I take that as a professional suggestion for the fuel injectors?

**wrench97** · 09-17-2009, 03:41 PM

If Bosh makes the injectors for that application and you can find them reasonably priced yes that's the way to go. Kem's are not terrible and usually priced less, but have a slightly higher failure rate.

**Midnight Tech** · 09-18-2009, 02:20 PM

Hit up your local NAPA and see if they have part number CRB 2-18313 in stock - they should run around $80-85.

wolfen1086 · 09-18-2009, 03:32 PM

Is that $80-85 each or for all 4?

I'm thinking that maybe I should replace the fuel rail too after what I read on here it sounds like that could be a problem I have every now and then with the fuel system, but the injectors I know need to be changed, I can loot at the holes, and for some reason I just get a gut feeling that those little holes are slightly bigger than they should be from wear. And I learned a long time ago that my gut feelings are always right.

**wrench97** · 09-18-2009, 04:33 PM

That's each at NAPA, the holes don't wear larger if any the plunger gets sticky or the holes become smaller or clogged with varnish and carbon.

09-13-2009, 12:11 PM	#1 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	2001 Jeep Wrangler Fuel regulator? my Jeep is a 2001, 2.5 FI. everywhere I look on teh internet shows the fuel rail that goes to the injectors as the fuel regulator, since its built into the rail, I've been around for 46 years and I know for a fact that a fuel regulator should have a return line hooked up to it somewhere, alas theres only one line hooked up anywhere on this thing, and thats teh line coming from the tank supplying fuel to the rail. Anybody out there know what this thing really is? __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-14-2009, 02:41 PM	#3 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? hmmmm, know what, that part there is nowhere in my fuel system at all, the part on the end of the fuel rail is welded to it from the factory, so it must be a damper or some kind, None of teh parts counter guys, ad "experts" at the dealer can tell me what this thing is, all they can tel me is the whole rail is $110 and that piece comes with it already permanently attached . __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-15-2009, 01:55 AM	#4 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 549 OS: WINXP	Re: 2001 Jeep Wrangler Fuel regulator? Can you post a clear picture of the component and its location on the fuel rail ?

09-15-2009, 08:25 AM	#5 (permalink)
SABL Moderator Relaxation Room Join Date: Jul 2008 Location: Galena, Ohio Posts: 1,238 OS: WinXP SP3	Re: 2001 Jeep Wrangler Fuel regulator? I'm showing a regulator in the parts list, also. I also see a TBI gasket on the list. Perhaps the regulator pertains to the throttle body injection and not the Multi-port system. I will see if I can locate my Jeep manual and take a peek at the fuel systems. __________________ Every rose has it's thorn

09-15-2009, 04:01 PM	#7 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? OK I searched the entire internet ( found both ends too) I can't find this part anywhere, BUT I did find them for sale on Ebay http://cgi.ebay.com/ebaymotors/ws/eB...n%3D3%26ps%3D5 Thats about what it looks like only where teh rail is smashed to bolt it on on mine it isn't __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-15-2009, 05:47 PM	#9 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? Ok that [art I DO have, I remember it from changing the fuel pump when it went, thanks Wrench, at least now I know where the fuel regulator is, now to find out *** that thing on the rail is, I know I need fuel injectors the ones on it now have 75K on em, but the rail is $110, so if I don't need a new one why change it right? __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-16-2009, 01:35 AM	#10 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,627 OS: Win7	Re: 2001 Jeep Wrangler Fuel regulator? Try cleaning the injectors with a pressurized cleaning kit. Most of the time it works. I'll poke around later to see if I can find out what it is. __________________ Power Supply and Selection

09-16-2009, 02:26 PM	#12 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? Thats the best answer I have heard from anybody, I even emailed Jeep and they said its either a regulator or a damper, but between the other picture you posted and this one I now know that its nothing more than a damper, thanks wrench. I will change the injector instead of just cleaning them, they have slight rust on the outside, and I want to be rid of that before it turns into major rust. I treated the fuel rail with rust converter, but I was kinda scared to treat the injectors in case I dripped the stuff onto the nozzle openings. __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-16-2009, 03:05 PM	#13 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,627 OS: Win7	Re: 2001 Jeep Wrangler Fuel regulator? I haven't priced them lately but they were about $48 cost a couple of years ago. __________________ Power Supply and Selection

09-16-2009, 03:33 PM	#14 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? I priced both Injectors and fuel rail here localy at a parts store, the injectors are %58. 95 each and the fuel rail is $110.45. But thats just here in Va Beach, I can get them online cheaper. But the question is, do I trust the internet enough to order those type of parts and actually get that exact replacement part. The credit card isn't an issue, I have security that the govt can't break for that :). __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-16-2009, 03:37 PM	#15 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,627 OS: Win7	Re: 2001 Jeep Wrangler Fuel regulator? Big thing with me is the brand Bosh & Denso are probably the best. __________________ Power Supply and Selection

09-17-2009, 03:03 PM	#16 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? So can I take that as a professional suggestion for the fuel injectors? __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-17-2009, 03:41 PM	#17 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,627 OS: Win7	Re: 2001 Jeep Wrangler Fuel regulator? If Bosh makes the injectors for that application and you can find them reasonably priced yes that's the way to go. Kem's are not terrible and usually priced less, but have a slightly higher failure rate. __________________ Power Supply and Selection

09-18-2009, 02:20 PM	#18 (permalink)
Midnight Tech Admin/Head GreaseMonkey/Igor's alter ego/Grand Exalted PoohBah Join Date: Dec 2001 Location: SC Posts: 2,924 OS: Windows XP Home/Pro SP3/Windows 98SE/Fedora Core 6/RH 7.2 with Autopoint/TAMS II	Re: 2001 Jeep Wrangler Fuel regulator? Hit up your local NAPA and see if they have part number CRB 2-18313 in stock - they should run around $80-85. __________________ Please post all questions in the appropriate forum. Questions sent by email or PM will not be answered. Sharing my life...with my Imzadi! Interested in Trek gaming? Check out the Dynaverse! Proud supporter of the Carolinas Aviation Museum. If we have helped you in any way, please donate to keep TSF up and running!

09-18-2009, 03:32 PM	#19 (permalink)
wolfen1086 Registered User Join Date: Oct 2007 Location: Va Beach Posts: 259 OS: Win XP SP3	Re: 2001 Jeep Wrangler Fuel regulator? Is that $80-85 each or for all 4? I'm thinking that maybe I should replace the fuel rail too after what I read on here it sounds like that could be a problem I have every now and then with the fuel system, but the injectors I know need to be changed, I can loot at the holes, and for some reason I just get a gut feeling that those little holes are slightly bigger than they should be from wear. And I learned a long time ago that my gut feelings are always right. __________________ I'm gonna rot ? yea I know, might as well smile in the mean time :)

09-18-2009, 04:33 PM	#20 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,627 OS: Win7	Re: 2001 Jeep Wrangler Fuel regulator? That's each at NAPA, the holes don't wear larger if any the plunger gets sticky or the holes become smaller or clogged with varnish and carbon. __________________ Power Supply and Selection