i have been having trouble with my trans leatly and its getting very fustrating. last time i checked the code it was 23. so i checked the tps sensor and i got 1.3 volts idle 3.8 wot. my question is can this sensor be bad put still put out the right volts??? i dont think that it has been changed cause it is gray just like the motor. do you guys think i should replace it any way. are there any other sensors that could be bad. the tac and speedo work great no fluctuations at all.

 

91 f-250 200k e4od stock

 

Although I know nothing about an auto other than what I have read here over the years I will offer this.

I have read the FILP can have dead spots between wide open and closed which causes problems.
I also seem to remember something about the grey sensor should be replaced with the newer black one...hope that is not backwards for the colors.

Also I have read about checking the electrical connectors and grounds.

 

thanks dave i am going to change it out and see what happens all i know is this is going to be the last automatic i ever own. the problems with this trans almost makes me think shifting in traffic isnt all that bad any more lol

 

Tell us more of the problems .....don't keep them to yourself. How can we help to fix it.

 

well the over drive light goes on every so offten then it will just shut off. the trans shifts fine when the light is off there is no noise or slipping at all. when the light come on shifting gets very hard when it goes out it goes back to normal just like that???????????????????
also what is the mpl sensor and where is it at???

 

I use a good digital volt meter, and check the center wire as positive, ground staight to battery, The info I have calls for 1.05-1.1V at idle and 3.8 v MINIMUM at WOT, no more than 4.3. Run the FIPL back and forth several time to check for no dead spots, clean and lube the connector pins, and as Dave mentioned check grounds. One tranny guy sayes to put an additional ground strap from tranny to frame as good insurance. The MAP is the altitude compensator I believe, and is clipped to the firewall just above and inboard of the heater/ airconditioning box. MLP would be the sensor on the drivers side of the tranny that sense manual input lever position, provides different ohm readings dependant upon selection made, P R, 1, etc. a problem with this should give you code 67. Early FIPL's were black, recommendation is replace any colored unit with the later grey color, every 60K or more miles.