[EDIT, do not idle up until this is fixed! possible damage to starter and ring gear/fly wheel(app).]
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bad starter relay,
http://www.ncttora.com/fsm/2000/Repa...lay%20insp.pdf
or ignition switch,
http://www.ncttora.com/fsm/2000/Repa...witch/insp.pdf
R/B #2 and JB #1 location,
http://www.ncttora.com/fsm/2000/Repa...rical/loca.pdf
the ECU may have a code stored on this. per book, not all codes stored prompt a light.
when you're done, pulling the 20 amp EFI main fuse for 30 secs, key off, resets the ECU. located JB #1.
[EDIT,
it's important that you take it out for a non-aggresive run that includes hwy speeds after ECU reset. it needs to gather new base line parameters.]