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-   -   i have no clue whats wrong!!! (https://www.cherokeeforum.com/f2/i-have-no-clue-whats-wrong-43028/)

carencro xj 03-31-2010 08:26 AM
engine problems
 
i have a 1990 xj laredo .my jeep is runing funny when i go 15-60mph it revse high and it feels like it has no power.i changed my trans fluid and filter about three weeks ago and the magnets were clean.its like when i take off it has to stay reved up high for it to go .but if i stomp on it it goes .this only happens in drive.and its not somthing that gradually started happening .it just started this morning.:dunno: i just cleaned the throttle body and its still doing it and i found a cracked vacum hose i fixed that to but it still keeps doing the same thing.

93gc40 03-31-2010 09:31 AM
What trans fluid? What is the fluid level?

DagBMX 03-31-2010 09:42 AM
is it automatic or manual trans? any other symptoms you may have noticed?

dyte2004 03-31-2010 11:11 AM
this might sound daft but check you dont have a brake seized up

carencro xj 03-31-2010 12:07 PM
Originally Posted by 93gc40 (Post 489756)
What trans fluid? What is the fluid level?

fluid level is good and it calls for dexmerc fluid. i have an automatic trasmision.

carencro xj 03-31-2010 12:10 PM
Originally Posted by DagBMX (Post 489766)
is it automatic or manual trans? any other symptoms you may have noticed?


its an automatic trans and it doesnt rev up
by itselfe its like it has only one gear .

jd2311900 03-31-2010 12:15 PM
is it shifting gears or is it stuck if first?

carencro xj 03-31-2010 12:18 PM
Originally Posted by jd2311900 (Post 489982)
is it shifting gears or is it stuck if first?
it feels like its stuck in first but i cant really tell it only switches gears after 4000RPMs

RENIXBEAST 03-31-2010 12:24 PM
Check your TPS. It actually controls your transmission (no one said Jeep designers were smart). There are many write-ups. Try this one. http://billyxj.tripod.com/SENSORS1/index.html

carencro xj 03-31-2010 12:26 PM
Originally Posted by RENIXBEAST (Post 489994)
Check your TPS. It actually controls your transmission (no one said Jeep designers were smart). There are many write-ups. Try this one. http://billyxj.tripod.com/SENSORS1/index.html

i just took a look at it but idk how to tell if its bad so ill try this

Ninja Falco 03-31-2010 02:49 PM
Sounds like your Throttle Position Sensor. Make sure you always disconnect the negative battery cable before working on your baby. It senses how easy your pressing on the pedal and shifts accordingly. When you floor it, it senses it and down shifts On easy acceleration it shifts up for cruising. My jeep wouldnt start one day and I started messing with wires. I unplugged the TPS and plugged it back in checking the terminals. When it started back up it wouldnt shift without flooring it rpms reaching 4500. After the new TPS it started shifting normal.

carencro xj 03-31-2010 03:12 PM
Originally Posted by RENIXBEAST (Post 489994)
Check your TPS. It actually controls your transmission (no one said Jeep designers were smart). There are many write-ups. Try this one. http://billyxj.tripod.com/SENSORS1/index.html

i guess my tps is bad cause i cant even set it

carencro xj 03-31-2010 03:15 PM
Originally Posted by Ninja Falco (Post 490197)
Sounds like your Throttle Position Sensor. Make sure you always disconnect the negative battery cable before working on your baby. It senses how easy your pressing on the pedal and shifts accordingly. When you floor it, it senses it and down shifts On easy acceleration it shifts up for cruising. My jeep wouldnt start one day and I started messing with wires. I unplugged the TPS and plugged it back in checking the terminals. When it started back up it wouldnt shift without flooring it rpms reaching 4500. After the new TPS it started shifting normal.

thats exactly what its doing .do i have to set it when i get the new one and if so can you tell me how.

carencro xj 03-31-2010 08:48 PM
Originally Posted by Ninja Falco (Post 490197)
Sounds like your Throttle Position Sensor. Make sure you always disconnect the negative battery cable before working on your baby. It senses how easy your pressing on the pedal and shifts accordingly. When you floor it, it senses it and down shifts On easy acceleration it shifts up for cruising. My jeep wouldnt start one day and I started messing with wires. I unplugged the TPS and plugged it back in checking the terminals. When it started back up it wouldnt shift without flooring it rpms reaching 4500. After the new TPS it started shifting normal.

thanks i changed it problem solved.


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