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3,754 Posts
What is this? I know... I'm that much of a "do-yourself" newb.
IDM=Injector Driver Module, PCM=Powertrain Control Module, not to sure about F/P .
 

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285 Posts
I think the F/P is fuel pump. There is a relay for each of these systems in the fuse panels and the OP suggests having "one" as a spare because it is interchangeable and can be used in any of the positions.
 
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