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Old 09-18-2014, 09:35 PM
MoJ10 MoJ10 is offline
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86 J10 fuel line diagram??

I'm trying to get this beast down the road and the PO "thinks" he may have plugged the lines in wrong or has the rollover valve hooked up wrong. Basically, it won't pull fuel from the tank. He said he dropped the tank down to install the lift and let it hang by the hoses, now it doesn't work. Bought a manual but nothing detailed in it that I can find. Any good diagrams? I've been through the forum for days and can't find what I need. Thanks for any help.
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Old 09-19-2014, 06:02 AM
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Dirtfarmer Dirtfarmer is offline
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you looking for tank end or motor end,
There are two lines coming from the tank to the motor, A small 1/4 inch return and a 5/16 suction. At the motor end the the suction line goes to the inlet (barb) of the fuel pump. The outlet steel line of the fuel pump goes to the inlet of a filter with three barbs. the outlet of the filter has two barbs a small one which goes back to the the small return line going back to tank and the large one goes to the inlet of the Carb. Clear as Mud right. Pretty sure the tank only has two corresponding barbs
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Old 09-19-2014, 01:17 PM
MoJ10 MoJ10 is offline
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Quote:
Originally Posted by Dirtfarmer
you looking for tank end or motor end,
There are two lines coming from the tank to the motor, A small 1/4 inch return and a 5/16 suction. At the motor end the the suction line goes to the inlet (barb) of the fuel pump. The outlet steel line of the fuel pump goes to the inlet of a filter with three barbs. the outlet of the filter has two barbs a small one which goes back to the the small return line going back to tank and the large one goes to the inlet of the Carb. Clear as Mud right. Pretty sure the tank only has two corresponding barbs

This would be the tank end, sorry. The tank has the rollover valve and the vent and all that.
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Old 09-19-2014, 01:23 PM
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tgreese tgreese is offline
 
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All the Jeep TSMs (factory service manuals) that I've seen have had a good drawing of the fuel tank plumbing. I do not have a manual for anything as new as '86. If you don't have the manual, you could buy one (excellent reference - recommended) or maybe someone will copy that page for you.

There is the first three sections of the '82 TSM here - http://oljeep.com/edge_parts_man.html - maybe the fuel plumbing is the same.
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Old 09-19-2014, 06:20 PM
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Dirtfarmer Dirtfarmer is offline
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I just looked through my 84/87 factory service manual and couldnt find anything about the fuel tank.
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Old 09-19-2014, 06:35 PM
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Tripwire Tripwire is offline
hey,does anyone here know how to.......
 
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bypass the roll over valve ( unless you really need it) mine went bad on my wrangler and caused the same issue...also be sure the fuel filter near the carb is sitting right ( if it has the waggie style one) the smaller tube should be exactly at the 12 oclock position

you should also check for busted /cracked lines
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Old 09-19-2014, 08:37 PM
MoJ10 MoJ10 is offline
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Ok, thanks for the help on that. I think I got it. I didn't see anything coming out of the tank on the front side except the larger fuel line and the smaller "vent line?" I think is what that is. I have another question however, never ending with jeeps I suppose. What is this wire for that was hanging down next to the fuel lines. I pushed it onto a small male stub on the round bung cap on the front side of the fuel tank where the lines come out. It seems to fit fine, I thought it was for the fuel gauge or something, but the fuel gauge is still pegged full. (another project in the near future) Couldn't find anything in the manual. Where do I get a TSM? I bought a Haynes manual, that helps a little.
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Old 09-20-2014, 06:15 AM
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WHSII WHSII is offline
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That wire and a ground should go to the sending unit.

I buy my Tech Manuals off of e-bay. I get them on disk for around $30. You can find paper versions from $50 up.
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  #9  
Old 09-20-2014, 07:18 AM
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tgreese tgreese is offline
 
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The Haynes and Chiltons manuals are ok for tuneups and such, but the factory manual has way, way more detail. Get the factory manual and use the haynes manual as a door stop or to hold up the corner of the bed or something.

This is from the '82-83 TSM (on the oljeep.com site)



The Jeep factory manual is thick and full page size, like a major city phone book. Lots of detail.

This is typical of every Jeep factory manual I've seen, from '71 thorugh '83. Likely the '86 manual has something similar. However, there were not major changes from '83 to the end, so this diagram probably applies.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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Old 09-21-2014, 09:17 AM
MoJ10 MoJ10 is offline
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Perfect!! Thank you gents! That's exactly what I was looking for. I'll have to track down the ground wire I guess, I was trying not to drop the tank, oh well, guess I'll just do it and make sure it's all good to go while it's down. ugh.
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Old 02-22-2020, 10:09 AM
Jccjoe Jccjoe is offline
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Fuel line

Quote:
Originally Posted by Dirtfarmer
you looking for tank end or motor end,
There are two lines coming from the tank to the motor, A small 1/4 inch return and a 5/16 suction. At the motor end the the suction line goes to the inlet (barb) of the fuel pump. The outlet steel line of the fuel pump goes to the inlet of a filter with three barbs. the outlet of the filter has two barbs a small one which goes back to the the small return line going back to tank and the large one goes to the inlet of the Carb. Clear as Mud right. Pretty sure the tank only has two corresponding barbs

I have been searching for info regarding the above i have a regulater to add to the above route , can anyone place it in the sequence
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