banjobill80 Posted December 28, 2015 Share Posted December 28, 2015 hello all hope you had a merry Christmas..so I'm almost ready to set my 89 4.0 into my 86 mj i have modified the firewall and core support and have the motor mounts bolted in place and i started to think about the fuel situation with the 2.8 being carbarated mechanical pump and the 4.0 being electric in the tank i was wondering what some of you guys have done i was thinking of useing and external pump but not sure what psi i would need and thought someone could share what they have done and save me some headachs thanks a million Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted December 28, 2015 Share Posted December 28, 2015 If I'm not mistaken, the fuel tank that came with the 2.8L equipped models didn't have a splash/reserve tray in the bottom. IIRC, that means you're able to use an XJ fuel sending unit (which are far easier to find and can be donated from your '89 XJ), without clearance issues. I'm pretty sure I remember reading that somewhere on this forum. Link to comment Share on other sites More sharing options...
banjobill80 Posted December 30, 2015 Author Share Posted December 30, 2015 onlyinajeep726 thanks for the info i will try and find a usable sending unit and new pump from an 89 first ill check my mj tank for the reserve pan..my 89 doner is actually an 89 comanche wich had suffered such frame rot that it snaped in half right behind the cab. it was pitiful to see but worked well for me as i got motor,trans harness just about everything i needed for the swap except fuel tank lol Link to comment Share on other sites More sharing options...
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