High Volyage ignition leak can cause the computer to become confused. You said you didn't have double plat plugs.
I think the earlier response is on track. Check your plug wires and plugs. Could be loose plug wire, the wire may be pulled out of the boot, a wire may be rubbing and leaking volts. Also, check that no low volt wiring is near the plug wires. An induced current can confuse the computer.
My name is Richard. I was a Contouraholic.
NOW: '02 Mazda B3000 Dual Sport, Black
BEFORE: '99 Contour SE Sport
Duratec ATX Spruce Green
PIAA 510's, Foglight MOD, K&N Drop-in
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