Some TPS help

Hey all,the other day i was troubleshooting my TPS sensor and set the voltage at 0% throttle to 0.45 volts.As I opened the throttle gradually the voltage increased gradually as well until it got to about 3.89 volts at WOT,however as soon as it got to the WOT voltage it dropped to about 2.3 volts and stayed there until I started closing the throttle and the voltage went back to 3.89 and decreased gradually as I closed the throttle.
Now my question is, should the voltage spike down like that at WOT or is there something wrong?

Thanks in advance.

---------- Post added at 01:04 PM ---------- Previous post was at 12:42 PM ----------

EDIT:
Nevermind, i just checked my tps again and it worked prefectly fine.Maybe the contact between my multimeter and the pin was off before.