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2000 Ford F150 running rough

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  • 2000 Ford F150 running rough

    My 2000 Ford F150 has started running very rough. It seems to be worse on cng then on gas. The OBD shows a code of 1640 which says there are other codes in onother module. Does anyone know where this other module is and how to get the codes from it? The truck has 37000 miles on it. It starts out fine cold but after it warms up it starts running rough. When you push on the throttle you can here a clicking sound coming from the compuvalve. Also can anyone tell me where I can find manuals for troubleshooting this vehicle. Thanks cjones
    Last edited by cjones; 06-10-2008, 05:27 PM.