The Chiltons manual 1981-1996 Isuzu Amigo/Pick-up/Rodeo/Trooper #36100 has a mistake on page 2-12...
The drawing for the 3.2 cylinder number location is backwards!!
Look above at the 3.1 drawing -it is correct. They have the 1-3-5 and the 2-4-6 flipped....This dealt me fits for about an hour until I noticed what they had done...
When you are checking firing order--be careful......

1997 Wrangler TJ 5 speed, 2.5 L. Mostly stock except for 31x10.50's on Black Rockcrawler Rims.
1998 Wrangler TJ 5speed, 4.0L. Rusty's 3.5 " lift,33"BFG,4.10 gears,Novak transfer case shifter