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Sorry no, manufacturers don't stamp firing order on caps. You need to get service manual to configure or google your year and engine size "firing order" - I'd do it for you but I'm answering from a phone
Plug wire order is: 153624 on six cyl 4.0 and 18436572 for v8. #1 cylinder on 6cyl is the front one and on V8 is front on driver side. 1357 left side, 2468 right side. #1 on cap is easily found by turning the crankshaft till the timing mark aligns with 0. but that can be 180 degrees off unless rotor points away from the block (6) or towards the front of the engine (8)..
To avoid confusion, tag and remove the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one
orientation, it could have been removed previously and rewired. The
resultant wiring would hold the correct firing order, but could change
the relative placement of the plug towers in relation to the engine.
For this reason it is imperative that you label all wires before
disconnecting any of them. Also, before removal, compare the current
wiring with the accompanying illustrations. If the current wiring does
not match, make notes to reflect how your engine is wired.
Fig. 1: The firing order can usually be found cast onto the intake manifold
1-5-3-6-2-4 ALL Jeep 4.0 motors use this firing order. Any year, any model, high output or not.
Also, the spark plug wire placement on the cap, in a clockwise direction from the post nearest the engine block is: 6-2-4-1-5-3.(to the left side of the number 6 post, there should be a hold downscrew or strap for fastening the distributor cap to the distributor. For a picture diagram, please go to this website: - http://www.fixya.com/cars/t2859850-need_spark_plug_wiring_1993_jeep_4l - http://www.jeepz.com/forum/engine/16923-six-cylinder-4-0-liter-jeep-engine-specs.html