The older models (renix) had the temp sensor on the left side of the block. Your 94 has one for the gage on the t-stat housing and one for the computer at the back of the head, left side of valve cover. The sputtering/stall could be the throttle position sensor or air intake control valve. There are many posts on both of these so do a search.
2000 XJ Limited, 4.5 Rusty's All spring lift; 265/75/16 BFG KM2's; 4.0, aw4, 242.
2001 XJ Sport, 4.5 Rusty's lift, 32x1150x15 Hankook Dynapro MT's. 4.0, aw4, 231, 8.25 rear with power trax locker.
08 f 150 2.5 lift, 33's, arb.