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Unread 04-18-2011, 10:51 PM   #1
omy332
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wheres the fuel pressure regulator on a 91 jeep wrangler 4.0

where the fuel pressure regulator on a 91 jeep wrangler 4.0. my jeep wont start and from some suggestions i think its either the fuel pressure regulator or the fuel pump. can the fuel pressure regulator be swapped for a new one or do i have installe both the regulator and fuel pump.

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Unread 04-18-2011, 10:53 PM   #2
lclark2074
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the regulater has a vacume line connected to on the fuel rail
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Unread 04-18-2011, 10:55 PM   #3
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Quote:
Originally Posted by lclark2074
the regulater has a vacume line connected to on the fuel rail
Yep, at the end of the fuel rail nearest the radiator.

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Unread 04-18-2011, 11:00 PM   #4
lclark2074
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max your slowing down no pics yet
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Unread 04-18-2011, 11:03 PM   #5
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Quote:
Originally Posted by lclark2074
max your slowing down no pics yet
LoL! These dam cellphones!!!!

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Unread 04-18-2011, 11:15 PM   #6
omy332
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thanks
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Unread 04-19-2011, 06:24 PM   #7
Newk76
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I think this is the same thing we just had to replace... the elbow coming from the end of the fuel rail to the rigid tubing was deteriorated & cracked something aweful. Here is a pic



Am I right?
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Unread 04-19-2011, 06:41 PM   #8
Mean Max
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Yes you are right! That is indeed the FPR (fuel pressure regulator) in your pic.

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Unread 07-01-2013, 11:43 AM   #9
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any special trick to remove and replace w/ new unit? Am ready to do that and have the part.
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Unread 05-05-2014, 09:44 PM   #10
heepyj
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I'm about to change my FPR on 93 YJ 2.5...Any tips?
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Unread 07-09-2014, 08:56 AM   #11
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Need to Change mine too. Any tips before I do this?
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Unread 07-09-2014, 09:09 AM   #12
Que89YJ
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On a XJ? The FPR is in the tank on the pump.
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Unread 07-09-2014, 09:14 AM   #13
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On a XJ? The FPR is in the tank on the pump.
I have a 91 YJ too. I should have clarified.
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Unread 07-09-2014, 10:09 AM   #14
Que89YJ
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It takes 10 minutes. Relieve the fuel pressure by pushing the valve on the rail. remove the vacuum line. Take out the mounting bolt. remove the old one, put the new one in. Tighten bolt and put the vacuum line back on.
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Unread 07-09-2014, 10:30 AM   #15
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Removed mine from fuel rail and discovered it was pretty clogged with little bits of black rubber. Uh oh... Ordered a new one from hesco and oops, did not seat properly. Seems my fuel rail accepts an older style fpr with a straight neck, not the newer one with a molded ring along the base. Hesco sent another one, same problem. Ended up giving to a buddy. Had to special order the correct unit from dodge dealer, ugh $$.

Replaced all fuel lines and she runs better than ever. Added an in line spin on fuel filter making filter changes a breeze

Now to resolve cold start issues and crank to cam correlation fault... It's always something
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