Since it was running fine before you installed the new plugs and wires, this is written in the Factory Repair Manual.
Caution: Proper installation of the ignition wires is critical to engine operation. If one spark plug wire is not properly installed at either the spark plug or the ignition coil, both spark plugs connected to the ignition coil may not fire under load.
Are your wires installed on the right spots in the ignition coil? Number 1 plug is beside the serpentine belt. See below:
E N G I N EC O I L 3 2
1 2 3 4 (plugs)4 1 (wires)
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Wednesday, October 1st, 2008 AT 3:50 PM