i changed out my tps sensore today cause it went bad. i put my new one in and now the problem is worse. it doesnt change gears to you get above 3000 rpm and when you take off from a dead stop it acts like its bogging down. if anyone knows what could be causing this please help this jeep is my daily driver and i dont have alot of money right now. hlpe please.

 

could be your idle air control motor or your tcu

 

what is a tcu. all i have mainly worked on have been older chevys and stuff. im new to fuel injection and jeeps altogether

 

did you put it back in the same position as the one you took off?On mine the holes are slotted so it can be adjusted.

 

mine didnt hsave any adjustment in it

 

tcu is the transmission control unit, im not sure of any way to test other than unplug it and drive without it and if the problem keeps up then its not the problem, but keep in mind that when driving with it unplugged you have to shift thru the gears manually, but im guessing its the iac or like previously stated the tps may be adjustable, best bet would be break out the haynes manual and read up on those two items and read thru the trouble shooting area too

 

Im not entirely sure how the jeep tps goes in, but on hondas, the sensor is spring loaded inside. You have turn it a quarter turn, hold it that way, then put it in the housing held in that manor. If you dont do it that way, the voltage reading is incorrect and it wont work right.

 

i will have to buy a haynes

 

Ok,did you go back and make sure everything is pluged in vacum lines look good and all that?

 

i put it back in the same way i took the old one out

 

yeah everything is pluged up and all that stuff

 

Then I would try this next.

 

You still may want to check the voltage at the tps connector. Make sure you're reading 5 there and then (depending on whether yours is a m/t or a/t) you should see what its reading at wot. For the 88s, it should read 4.6-4.7 at wot m/t, and for the a/t it should read .2 at wot.

 

what is wot

 

wide open throttle

All measurements should be made with engine OFF. All you need is power on to do this quick check. Also, you may need the spear type meter leads in order to get a reading through the back of the connector.

EDITED:
ALSO please keep in mind that those numbers are for an 88. It may be different numbers for a 98.