No diagrams here in WikiAnswers, but the 2 "Related Questions" below will provide lots of written information and instructions for cylinder numbering, coil numbering and getting / keeping the engine firing order straight.
The "How do you know which wire...?" question is oriented to folks just learning about cars, and the other is "just the facts".
Right above the thermostat housing..
cylinder location is stamped on the intake right above the cylinder. the firing order is also stamped on the intake manifold
axon terminal
If you look under the hood on the passenger side near the belt, there is a diagram near the belt location.
axon terminal
firewall 3 - 6 2 - 5 1 - 4 front
Diagram can be found in the proper Haynes manual, available at most auto parts stores. Coil paks may also be numbered for easy identification.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
ML 430 cylinder diagram
If it is the diagram you are looking for, a measuring cylinder looks like a beaker diagram just lengthened with a line at its base.
A little diagram might make it easier to explain. FIREWALL -------- |1 2 3| -------- |4 5 6| -------- FRONT OF CAR Cylinder 4 is the leftmost cylinder closest to you if you are looking at the engine head-on. Cylinder 5 is the middle cylinder closest to you... Hope this helps!
Yes, there is a diagram of the oxygen sensor location of a Isuzu Trooper. This diagram can be found in the cars maintenance manual.