The crank sensor... that throws an error code 41 doesn it?
If so, then yes it has been replaced... back in Dec 2000.

no Cam Postion sensor is 41

code 18: Cam/Crank error
code 41: Cam sensor circuit loss of signal

Hrmm.... crank sensor.... what'* the usual cost to replace one of those?

I don't ever remember that failing, off the top of my head.
Could/would it have been replaced when I got the new engine?
It also could have been replaced during one of the many (a lot of things were done and the bill was expensive) deals.

I dunno man, I still think its a fuel delivery thing. I'm not sure how the crank sensor is involved...but I'm no expert.

In my estimation its either throttle postioning or fuel delivery

Shouldn't the TPS throw an error code?