Kickinmule Posted August 27, 2014 Share Posted August 27, 2014 Ok since it has been at least a year since my '88 has been started how do i refresh the fuel system before trying to start it? I have not gotten the fuel sending unit to respond yet. I reground the ground behind the tail light, Thank Y'all for that one! Can i jump the resistor to see if it is the problem? Link to comment Share on other sites More sharing options...
Kickinmule Posted August 27, 2014 Author Share Posted August 27, 2014 Alright so I didn't do my do diligence. So there is also a Fuel Pump relay. I can check that out... Looks like I need to hone my search skills and keep reading! Link to comment Share on other sites More sharing options...
Kickinmule Posted September 8, 2014 Author Share Posted September 8, 2014 Ho Mama! pretty sure i have found the problem! And this is after a thorough cleaning! I wish I had taken pics of it before! Yippee can't wait to get that tank off and see the innards! So What is my best option on the sending unit? I've read here that it's nearly impossible to find one for this '88 shortbed 4.0. Anyone out there wanna part with one? I don't know if a float/sending unit will even reattach to this mess. Link to comment Share on other sites More sharing options...
88ComancheMitch Posted September 9, 2014 Share Posted September 9, 2014 New tank is $100 on rock auto. Might be worth it. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 9, 2014 Author Share Posted September 9, 2014 New tank is $100 on rock auto. Might be worth it. If my tank is shot(haven't pulled it yet) or not would replacing it get me to a newer version fuel sending unit? The rock auto tank doesn't specify availability of replacement sending unit. Thanks Mitch Link to comment Share on other sites More sharing options...
dave92cherokee Posted September 9, 2014 Share Posted September 9, 2014 There is no replacement sending unit for our trucks, only way you'll find one is junkyard, or someone who's parting a truck out. The other option is I've seen on here before that there's a company you can send your old sending unit out to and they'll completely rework it, replacing/rebrazing tubes to seal them replacing bad fuel level floats and what not. The other option is to get a new tank without the slosh pan inside it and use a cherokee sending unit which is a mirrored image of the mj sender. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 9, 2014 Author Share Posted September 9, 2014 Thanks Dave, pulled the tank this morning. Check out these pics! Well it looks fine from here: OK how about a little iPhone investigating... Uh Oh! Is it possible that someone Cooked a Turkey in here! Looks Wonderful, Lets see what it feel like... Lets dig a little deeper after rattling the tank and giving it a few smacks... 2 Handfulls and i cry Uncle! So I think this tank is not gonna make it. If anyone has a different opinion I would love to hear it. Certainly didn't leak! If it could be salvaged then I'm saddled with finding a fuel sending unit that is out of production. So what are the pitfalls of the baffle-less/slosh pan-less tank and the Cherokee sending unit? Are there any other tank/sending unit combos that will operate and fit properly? Link to comment Share on other sites More sharing options...
88ComancheMitch Posted September 9, 2014 Share Posted September 9, 2014 I'd get a new tank for sure. Don't know the difficulties of getting a different tank. Link to comment Share on other sites More sharing options...
88ComancheMitch Posted September 9, 2014 Share Posted September 9, 2014 Your gas tank looks like Mordor. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 9, 2014 Author Share Posted September 9, 2014 Smells like Golum's Rectum Link to comment Share on other sites More sharing options...
Spectormj Posted September 9, 2014 Share Posted September 9, 2014 How do you know what Gollum's rectum smells like?? Did you have a secret romance with him? Hahah just messing with ya Link to comment Share on other sites More sharing options...
Kickinmule Posted September 10, 2014 Author Share Posted September 10, 2014 @Spectormj we hung out a little, did some spelunking, just a casual middle earth thing... Link to comment Share on other sites More sharing options...
dave92cherokee Posted September 10, 2014 Share Posted September 10, 2014 The other option that I've seen people talk about on here is changing over to a durango tank and sending unit. Do a search here and you'll find the info, can't remember if it worked for the renix era or if it was for when people were doing the 97+ conversions or what. Link to comment Share on other sites More sharing options...
shelbyluvv Posted September 10, 2014 Share Posted September 10, 2014 That is for the 97+ conversion crowd. You can still buy new tanks for the MJ. http://www.jcwhitney.com/replacement-direct-fit-steel-fuel-tank/p3038634.jcwx?filterid=d1169y1987g104j1 Link to comment Share on other sites More sharing options...
VolsJK Posted September 10, 2014 Share Posted September 10, 2014 @Spectormj we hung out a little, did some spelunking, just a casual middle earth thing... Just lost my Mtn Dew... thanks. Link to comment Share on other sites More sharing options...
Spectormj Posted September 11, 2014 Share Posted September 11, 2014 @Spectormj we hung out a little, did some spelunking, just a casual middle earth thing... Haha oh god so I'm guessing you were the fall guy for it Link to comment Share on other sites More sharing options...
Kickinmule Posted September 11, 2014 Author Share Posted September 11, 2014 Okay so Dan at Tri-Star the fuel sending unit guy quoted $185 to refurb the sending unit. Said he was in the middle of another 88 MJ unit as we spoke. Price doesn't include a pump. So I need a Bosch I gather? The tank is $100. So what else do I need to consider replacing to get some fresh quality fuel burnin in this project. Injectors? Plugs? Cap, rotor, wires? Also what is the part that is attached to the topside of the tank? Is it something that needs replacing? Looks like it maybe a vacuum line. Yes, I'm in the middle of a project w/o manuals and a small pile of skills! Link to comment Share on other sites More sharing options...
dave92cherokee Posted September 11, 2014 Share Posted September 11, 2014 The parts in the top are the roll over valves, in normal operation they allow the gas fumes to escape and go to the charcoal canister if the vehicle is rolled over they close off to prevent fuel from spilling out. They can normally be re-used but the rubber seal usually wears out on them causing a loose fit. If you replace the tank, get the sender refurbed, I would replace the inline filter and injectors as well. The rest of it is normal tune up items that should be done on a regular maintenance schedule. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 11, 2014 Author Share Posted September 11, 2014 on the topside, if I pull the fuel rail, is there a way to clean it or purge it and the fuel lines in preparation for new tank, sender and fresh fuel? Link to comment Share on other sites More sharing options...
shelbyluvv Posted September 11, 2014 Share Posted September 11, 2014 I read a review on Dodgesweptline about using plain apple cider vinegar to remove rust and varnish from a fuel sender. I figure it should work for a fuel rail as well. All he did was buy a gallon of vinegar, filled up a plastic tub the part fit in, soaked the part for 24-48 hours and it ate most of the rust off along with the varnish. It's worth a try. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 25, 2014 Author Share Posted September 25, 2014 Got some parts in and a few installed. So movin to my build thread: http://comancheclub.com/topic/44165-new-texas-member-with-88-chief-just-acquired/ Thanks yall for your input. Link to comment Share on other sites More sharing options...
metrictonner Posted September 29, 2014 Share Posted September 29, 2014 If you still have a fuel filter...frame rail, left side in front of the tank... the injector rail might be clean. Don't forget to pull the return line nipple out of the old tank before you trash it. I don't see it on your hanger pictures. Link to comment Share on other sites More sharing options...
Kickinmule Posted September 29, 2014 Author Share Posted September 29, 2014 Thanks metrictonner! yep I pulled the fuel filter while dropping the tank; poured out some of the gravy! and marked that down on the "to get" list. The return line nipple? is that on the sending unit inside the tank or are we talking bout the two relief valves nippled into the top of the tank? Link to comment Share on other sites More sharing options...
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