To avoid confusion, always remove and tag all ignition related wires one at a time.
On 2.0L engines, if a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring may be the correct firing order, but could change the relative installation of the plug wires 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.
Fig. The 2.0L (9A and ABA) cylinder location and plug wire-to-distributor cap connections as viewed from the front of the vehicle. Distributor rotation is clockwise. The firing order is 1-3-4-2
Fig. The 2.8L VR6 cylinder location and plug wire-to-coil pack connections. The firing order is 1-5-3-6-2-4
Fig. The 1.8L cylinder location as viewed from the front of the vehicle. The firing order is 1-3-4-2
Fig. The 2.8L V6 cylinder location and plug wire-to-coil pack connections. The firing order is 1-4-3-6-2-5
Fig. 1.8L Engine- Firing Order 1-3-4-2-Distributorless ignition system (one coil on each cylinder)
Fig. 2.7L, 2.8L and 3.0L Engines-Firing order 1-4-3-6-2-5
Fig. 3.7L and 4.2L Engines- Firing order 1-5-4-8-6-3-7-2-Distributorless ignition system