87MJJeep Posted January 7, 2014 Share Posted January 7, 2014 My '87 4.0 has developed a drip from the round thing at the front of the fuel rail. It's the thing that has a vacuum(?) fitting on the side closest to the valve cover. From my first look, it appears that part is a part of the fuel rail. Is it serviceable on its own? Is a leak here common? Can someone tell me what all needs to be replaced? Any adjacent parts that are wise to replace at the same time? Thanks! Link to comment Share on other sites More sharing options...
87MJJeep Posted January 7, 2014 Author Share Posted January 7, 2014 I forgot to ask where should I look for any parts I need. Is this dealer only stuff? If so, is it hard to find? Link to comment Share on other sites More sharing options...
relyt120 Posted January 7, 2014 Share Posted January 7, 2014 That's the fuel pressure regulator, you need a new oring and maybe a spacer. I've only ever gotten them from a replacement part from advance, someone else may have a better source for just the oring. Link to comment Share on other sites More sharing options...
87MJJeep Posted January 7, 2014 Author Share Posted January 7, 2014 That's the fuel pressure regulator, you need a new oring and maybe a spacer. I've only ever gotten them from a replacement part from advance, someone else may have a better source for just the oring. Thanks for the quick reply. Are any special tools needed? I see how the fuel line snaps into the inlet. How does it attach to the rail? Can those be replaced without removing the rail from the intake and injectors? Link to comment Share on other sites More sharing options...
ParadiseMJ Posted January 8, 2014 Share Posted January 8, 2014 Hopefully the fuel pressure regulator is OK, not ruptured inside. If so, this is what you need: http://www.jcwhitney.com/crown-oe-replacement-fueloil-cooler-line-repair-kit/p3049536.jcwx The part pictured includes the hardware and packaging...most of the white part is packaging. You can make your own with a little legwork for considerably cheaper. The seal consists of a plastic clip, 2 O-rings and a spacer. If you disconnect the clip (squeeze the ears together and pull (you may have to remove the small bolt on the vacuum harness clip to pull the fuel line all the way out. Either on the line or IN the quik-disco, there is the 2 O-rings and spacer. SAVE the spacer, take the O-rings to the parts store or hardware store and get 2 new O-rings. Viton or Buna-N works for fuel. About 15 cents a pop. The plastic clips are available at the HELP section of the parts store. $3.99 for 6. If you're careful you can probably re-use the old clips. 5/16" Ford or Chrysler fuel line connectors. So, that's $3.99 and $1 for O-rings (you bought 6, just in case) = $4.99, You now have enough for the other fuel connector too!. Re-assemble by sliding an o-ring onto the fuel line, then the spacer, then the other o-ring. Then push it back into the FPR, until it clicks. Replace bolt on vac harness clip/tower. Link to comment Share on other sites More sharing options...
87MJJeep Posted January 8, 2014 Author Share Posted January 8, 2014 I appreciate the detailed reply. I tested the regulator tonight, and it's good! 31 or so psi with vacuum and 40 psi without vacuum! I'll tackle this Friday night or Saturday. If anyone in the meantime knows the exact size of the o-rings, I'll get them ahead of the disassemly. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted January 8, 2014 Share Posted January 8, 2014 The I.D. is 5/16" I don't know about the O.D. - which is why I suggested taking the o-ring with you to the store. Don 't forget to save the spacer...I do not know of a replacement source other than buying the whole connector. Link to comment Share on other sites More sharing options...
87MJJeep Posted January 9, 2014 Author Share Posted January 9, 2014 Thank you! Link to comment Share on other sites More sharing options...
87MJJeep Posted October 24, 2014 Author Share Posted October 24, 2014 I just wanted to post a late update. The right P/N o-ring that fit the fuel pressure regulator was found in the Fel-Pro 4-pk P/N ES-70599. ID is closest to 5/16" and the OD is approximately 9/16". Link to comment Share on other sites More sharing options...
cruiser54 Posted October 25, 2014 Share Posted October 25, 2014 Fuel disconnects Quick disconnect part numbers So far the Napa part numbers for just orings is: Napa 730-5018 3/8 Viton individual orings $1.56 each Napa 730-5017 5/16 Viton individual orings $1.35 each Napa CRB 212305 fuel line repair kit 5/16? $15.93 each Mopar repair kits: 83502745 fuel line repair kit 5/16 $6.99 Morris 83504447 fuel line/Trans line repair kit 3/8 $8.99 Morris Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 26, 2014 Share Posted October 26, 2014 In case your regulator is internally leaking, not the quick-connector: http://www.amazon.com/Injection-Pressure-Regulator-83503635-Cherokee/dp/B00LI9H6T0 Link to comment Share on other sites More sharing options...
lerpoel Posted July 27, 2017 Share Posted July 27, 2017 Hopefully the fuel pressure regulator is OK, not ruptured inside. If so, this is what you need: http://www.jcwhitney.com/crown-oe-replacement-fueloil-cooler-line-repair-kit/p3049536.jcwx The part pictured includes the hardware and packaging...most of the white part is packaging. You can make your own with a little legwork for considerably cheaper. The seal consists of a plastic clip, 2 O-rings and a spacer. If you disconnect the clip (squeeze the ears together and pull (you may have to remove the small bolt on the vacuum harness clip to pull the fuel line all the way out. Either on the line or IN the quik-disco, there is the 2 O-rings and spacer. SAVE the spacer, take the O-rings to the parts store or hardware store and get 2 new O-rings. Viton or Buna-N works for fuel. About 15 cents a pop. The plastic clips are available at the HELP section of the parts store. $3.99 for 6. If you're careful you can probably re-use the old clips. 5/16" Ford or Chrysler fuel line connectors. So, that's $3.99 and $1 for O-rings (you bought 6, just in case) = $4.99, You now have enough for the other fuel connector too!. Re-assemble by sliding an o-ring onto the fuel line, then the spacer, then the other o-ring. Then push it back into the FPR, until it clicks. Replace bolt on vac harness clip/tower. Having the same problem so will hijack this thread instead of creating a new one. :) What clips are you referring to? I am unable to purchase the repair kit here (in Sweden), so it seems like I gotta go the DIY route. O-rings are not a problem but I have no idea what clips I should be looking for. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted July 29, 2017 Share Posted July 29, 2017 https://www.autopartsway.com/part.cfm?83502745/c1y&g=1&gclid=eaiaiqobchmiul7n1j2v1qivwkwnch0gtacweaqyayabegjqppd-bwe Here's a picture of the part(s). The beige color "clip" slides over the fuel line until it clicks over the shoulder on the line. Then one o-ring slides on the line, then the spacer, then the other o-ring, then the whole assembly slides into the female end. The white part of the pictured part, is just packaging. There are two O-rings and a like size hard plastic spacer. You need the O-rings AND the spacer to properly compress the seal with the disconnect system. I only use the term "clip" for lack of a better word. It "clips" on, and when you successfully attach it, it "clicks" in. so it's really a clicking clip. :thumbsup: You'll also want to look inside the female end of the fuel line to make sure there aren't any old o-rings or spacer up in there before you try to put it together. If all you have is the naked fuel line with no plastic piece (aka clip), you'll need to source that or a similar "clip". But I've tried that with minimal success, so I just had to bite the bullet and buy the correct part. I've never seen the whole part sold in any auto parts store, and the clerks look at me like I'm nuts when I've asked for them. So online is the way to go. Alternately, you could DIY it by replacing/eliminating the whole disconnect system and just use tubing and compression fittings. Link to comment Share on other sites More sharing options...
Rockfrog Posted July 30, 2017 Share Posted July 30, 2017 The stock fittings can be replaced with standard GM fuel fittings, 3/8" inlet and 5/16" return. These are still in use today on GM/Chevy vehicles ... They match the fuel rails perfectly for both Renix and HO rails. Sent from my SM-G930W8 using Tapatalk Link to comment Share on other sites More sharing options...
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