Don't know what year you have so I don't know if this applies to yours. The ignition module connector is the exact same as the heater mounted under the throttle body. The harness is long enough to switch them around accidentally. I went on a service call about a month ago that gave me a real headache thinking the wiring diagram was wrong. They replaced the rear main seal. And when they reinstalled the motor they switched connectors. They also smoked the module doing that, so if you discover that's what you've got, don't be surprised if it still doesn't start.