Shifting problems

[Maltrice]

my car seems to have lost overdrive during the night because when i jumped in it this morning and put it in drive. I put my foot on the floor and it took easily 3 mins to get above 2,000 on the rpm gauge, when i throw it in netural it revs fine, and it has no problems when i shift it out myself but when I put it back into drive lets say at 55, it acts like im downshifting then it takes off again. I got the manual transmission ready to go in just in case just waiting on the brake pedal and cross member to be delivered, but I need the car to run so I can make money. Any idea whats going on, BTW the sensor under the hood has already been unplugged.

[onosqv]

Try this:

I originally found this in the nissan tech forum. . Here's a copy from my records. I can't remember where I found it for sure so here you go. I believe this was originally posted by nistech, correct me if I'm wrong. I hope this isn't against any forum rules, someone please let me know if it is.

" "1)start vehicle and warm it to operating temp.2) turn the key off and press the OD button to on position make sure shifter is in park.3)Turn the key on engine not running make sure the od light comes on for 2 seconds. If it does go to #4 if not post back.4) turn the key off and shift the trans to D. use the lock release if neccesary. Set the OD switch to off.5) turn the key on and wait at least 2 seconds. then set OD switch to on.6) Shift to 17) set overdrive switch to off.8) press accelerator to floor then release it completly9) set overdrive switch to on.

This will start the OD light to flash your codes. The light will have one long illumination flash then start flashing short blips. Watch the flashes carfully cause one or more of them will stay on slightly longer then the others. There are 10 flashes total. If say it goes like this, first the start signal long flash thenblip..blip..blink.blip..blip..blip..blip..blip..blip..blip. notice how the thrid was a little longer. The would be a 3 which corrospondes to TPS short or open.

When you do it there are 10 posibilities plus a no failure which would be all blips of the light."."

Then if you get an error, I believe the troubleshooting steps are in the FSM - or you should post the error on the online mechanic section (more guys check that - this isn't a vert specific problem).