fuel issues - JeepForum.com

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post #1 of 4 Old 07-22-2013, 10:01 AM Thread Starter
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1992 YJ Wrangler 
Join Date: Mar 2013
Location: milton
Posts: 58
fuel issues

ok so here is what i got iv got a 1992 yj and i put a 4.0 out of a 2000 cherokee in it and the problem is my original 4 banger had a return fuel line and this 4.0 has no return fuel line so i put a brass t in the supply line and a piece of hose to a needle vavle hooked back to the return line then i turn the fuel pump on to build pressure and once the pressure builds up you can here the fuel pump bog down i then open the needle valve to let some of the pressure return to the tank and it runs fine like this but i done killed three fuel pumps in 4 months luckly the warranty covered them i looked at the fuel pump for a 2000 cherokee and my 1992 fuel pump is way different so i guess what i have to do is get a gas tank for a 2000 jeep and the fuel pump so has any body this problem before thnxs for any input

kaitlynsdad is offline  
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post #2 of 4 Old 07-23-2013, 03:55 PM
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1988 YJ Wrangler 
Join Date: Jan 2013
Location: Hamel
Posts: 134
After my swap I just capped the return line. Then installed an inline pump, and installed a vented gas cap.

Works just fine for me, runs like a champ.

88 yj. 95 4.0 4 Brl carb, Msd ignition, offenhouser intake, headers. Ford 8.8 rear end, sun fire seats. About to install a newer ax 15 to replace my tired ba10.
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post #3 of 4 Old 07-27-2013, 07:39 AM
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1996 XJ Cherokee 
Join Date: Feb 2012
Posts: 18
have u changed the fuel pressure regulator bc that might be putting to much pressure on the pump not allowing it to flow correctly
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post #4 of 4 Old 07-27-2013, 07:46 AM
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1983 CJ8 
Join Date: Jul 2008
Location: Cow Mountain
Posts: 1,122
Later years use 48psi, older 4.0 about 38. So change regulator to a chrysler mid-late minivan.
billybooster2 is offline  

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