mpace6a Posted May 27, 2014 Share Posted May 27, 2014 So the holley red series I put on my MJ died after 10 months. Anyone have any other ideas for fuel pumps that might last a year this time? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 27, 2014 Share Posted May 27, 2014 Mechanical fuel pumps aren't that common anymore. I know that the garbage ethanol fuels are hard on alot of fuel system parts . Buy a good name brand with a lifetime warranty so when it goes bad , atleast you don't have to buy another. Link to comment Share on other sites More sharing options...
mpace6a Posted May 27, 2014 Author Share Posted May 27, 2014 Yeah the 2.8 originally had a mechanical pump, but i bought it with a blown motor, and just put a new 2.8 in from an s10. New engine was tbi, swapped all the carb stuff over, but it didnt have the hole in the block for the mechanical pump which is why i got the holley. The holley was ungodly loud, louder in the cab than my exhuast (no cat, no muffler, side pipe), and i don't really want to spend $120 on another pump thats going to be that loud and not last a year. Link to comment Share on other sites More sharing options...
neohic Posted May 27, 2014 Share Posted May 27, 2014 On a whim, I tried a mega cheap Mr. Gasket electric pump in my Volkswagen and I haven't had any issues with it. Granted, the car only sees a few months of good driving each summer, but it's been a few years that it's been in the car. I wouldn't consider it loud by any means and it sits right on the other side of the footwell... or "firewall" for the front-engine crowd. What I really don't like about it is that it really doesn't look nor feel like a quality piece. Keep in mind the Mr. Gasket logo though. :shake: 2-3.5 PSI: http://www.oreillyauto.com/site/c/detail/MRG0/42S/N0515.oap?pt=N0515&ppt=C0128 4-7 PSI: http://www.oreillyauto.com/site/c/detail/MRG0/12S/N0515.oap?pt=N0515&ppt=C0128 Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 27, 2014 Share Posted May 27, 2014 Is the pump in the tank? If not Why not get a newer mj sender and put a factory pump in it and wire it up and call it a day ? just a thought Link to comment Share on other sites More sharing options...
mpace6a Posted May 27, 2014 Author Share Posted May 27, 2014 On a whim, I tried a mega cheap Mr. Gasket electric pump in my Volkswagen and I haven't had any issues with it. Granted, the car only sees a few months of good driving each summer, but it's been a few years that it's been in the car. I wouldn't consider it loud by any means and it sits right on the other side of the footwell... or "firewall" for the front-engine crowd. What I really don't like about it is that it really doesn't look nor feel like a quality piece. Keep in mind the Mr. Gasket logo though. :shake: 2-3.5 PSI: http://www.oreillyauto.com/site/c/detail/MRG0/42S/N0515.oap?pt=N0515&ppt=C0128 4-7 PSI: http://www.oreillyauto.com/site/c/detail/MRG0/12S/N0515.oap?pt=N0515&ppt=C0128 Thats the first pump I tried Neohic. The 4-7 psi model couldnt keep up with the engine, went through 4 of them in 3 months. Thats when i bought the holley. Is the pump in the tank? If not Why not get a newer mj sender and put a factory pump in it and wire it up and call it a day ? just a thought No. Carbuerated engine that originally had a mechanical pump on the block. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 27, 2014 Share Posted May 27, 2014 Yeah I overlooked that , sorry . How about a fuel pressure regulator ? Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 I bypassed mine way back when and just left it be. Put a 4.0 or 2.5 sending unit in the tank, run a relayed fused accessory on in start position wire (take the always on with key in off the ignition switch) and put manual fuel pressure regulator on set at about 5 psi. Problem solved. Link to comment Share on other sites More sharing options...
mpace6a Posted May 28, 2014 Author Share Posted May 28, 2014 I bypassed mine way back when and just left it be. Put a 4.0 or 2.5 sending unit in the tank, run a relayed fused accessory on in start position wire (take the always on with key in off the ignition switch) and put manual fuel pressure regulator on set at about 5 psi. Problem solved. That sounds like a great idea. I would still need an mj sending unit though, right? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 28, 2014 Share Posted May 28, 2014 Yes but the pump would last longer being it's immersed in the fuel and it acts like like antifreeze for the pump. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 No, it would last longer because it's not a prone to failure mechanical pump. And I bet you could get an xj sender, pull the wire and wiring fitting out, swap those onto your 86 sender, and put the xj sock and pump onto your 86 sender. May require you to cut some tube off the stock sender. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 28, 2014 Share Posted May 28, 2014 Jeepco he allready had an electronic fuel pump that failed . He mentioned it earlier in the post . Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 28, 2014 Share Posted May 28, 2014 I have a lwb h.o. 23 gallon sender in "ok" shape if you need one Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 H.o. Senders only work on h.o. Fuel gauge reads backwards. And inline pumps can't quench heat. In tank can. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 28, 2014 Share Posted May 28, 2014 When did I mention a inline pump ? Can't you reverse wires to make the sender read correctly ? Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 You didn't, but he was taking about an inline pump, which are loud. And no, reversing wires isn't possible literally much less a viable option. The potentiometer has different pot readings between the 87-90 and 91-92, and again in 96-01. There are only 3 wires; Ground Fuel pump + supply Sending unit wire. The sender wire sends back resistance inputs to the cluster/computer. Reversing the wires ( which would have to be done inside the tank as there are only 3 externally and 4 internally) will peg it one way or the other, as well as frying the potentiometer Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 28, 2014 Share Posted May 28, 2014 Ok thanks for the explanation . But the sender itself would be helpful . It wouldn't have to be cut to fit the pump . He'd have to acquire the wiring though Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 Your sender would not be helpful...the potentiometer mounting is different so it is not useful. He really just needs an 87-90 pump with sender for this. Link to comment Share on other sites More sharing options...
mpace6a Posted May 28, 2014 Author Share Posted May 28, 2014 Your sender would not be helpful...the potentiometer mounting is different so it is not useful. He really just needs an 87-90 pump with sender for this. Thanks Jeepco, I'm going to look into this more. I'm not sure i can stand the noise of the inline pump any more. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 28, 2014 Share Posted May 28, 2014 I'm with you on that. Link to comment Share on other sites More sharing options...
86FUBAR Posted May 28, 2014 Share Posted May 28, 2014 Where is your pump located ? Remember that these pumps are better pushers than pullers so the closer to the tank the better. My bro in law has a 69 FJ with a 350/350/203 combo with a holly 4v carb and was running a mr gasket pump for a couple months till it gave up the ghost because it was mounted on the firewall 3 feet from the carb with only the carb filter installed and about 18 inches above the tank . It now sits 12" from the tank with filters before and aft hard lined all the way to the carb with a new mr gasket pump running it and has been working perfect for the last 5 years . I'm not yet convinced the pump is your problem . Link to comment Share on other sites More sharing options...
mvusse Posted May 28, 2014 Share Posted May 28, 2014 I use a trick flow pump mounted low just outside the fuel cell for my 4.0. Cooled by the fuel flowing through it, so it must be used with a return line to ensure constant flow of fuel. Never a problem with it yet other than it's loud and the noise transmits through the unibody. Maybe a setup like that with a universal pressure regulator and return line would last longer than an electric carburetor pump. Link to comment Share on other sites More sharing options...
Jeep Driver Posted May 28, 2014 Share Posted May 28, 2014 He could use an in tank pump like any other 4.0 or 2.5 and use a regulator. The carb regulators are cheap......like $30 for the 4.5 to 6lbs regulators. Edit: Sorry, the return style is more- http://www.summitracing.com/parts/hly-12-803bp Link to comment Share on other sites More sharing options...
mpace6a Posted May 28, 2014 Author Share Posted May 28, 2014 Where is your pump located ? Remember that these pumps are better pushers than pullers so the closer to the tank the better. My bro in law has a 69 FJ with a 350/350/203 combo with a holly 4v carb and was running a mr gasket pump for a couple months till it gave up the ghost because it was mounted on the firewall 3 feet from the carb with only the carb filter installed and about 18 inches above the tank . It now sits 12" from the tank with filters before and aft hard lined all the way to the carb with a new mr gasket pump running it and has been working perfect for the last 5 years . I'm not yet convinced the pump is your problem . The Holley was mounted under the bed, as close to the tank as I could get it, while being as far from the exhaust as possible. In line filter between tank and pump, and another in the engine bay before the carb so I could easily see if it was flowing or not. I'll probably get another mr gasket to get back on the road and work on a 4.0 pump later. Jeepco, would I be able to make an xj pump and sender work? Or do I need one from an mj? Edit: Nevermind on that last question, re read the previous responses. Gonna pull my sender and compare to my brothers XJ and see what i can do. Link to comment Share on other sites More sharing options...
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