Be careful cleaning to much on an old Jeep and it might have more problems.
Yes it will always help to clean up the TBI. So have at it and use something good. Gumout makes a spray that would help. Check the aiirbox and filter too.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184