HELP!!!!
10-09-2009, 01:42 PM
#1
Seasoned Member
Thread Starter
Join Date: Sep 2009
Location: columbus ga
Posts: 374
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1994
Model: Grand Cherokee
Engine: 5.2
HELP!!!!
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.
10-09-2009, 01:49 PM
#3
Seasoned Member
Thread Starter
Join Date: Sep 2009
Location: columbus ga
Posts: 374
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1994
Model: Grand Cherokee
Engine: 5.2
what is a tcu. all i have mainly worked on have been older chevys and stuff. im new to fuel injection and jeeps altogether
10-09-2009, 02:02 PM
#6
CF Veteran
Join Date: Dec 2008
Location: eaton ohio
Posts: 1,533
Likes: 0
Received 0 Likes
on
0 Posts
Year: 93
Model: Cherokee
Engine: 4.0
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
10-09-2009, 02:03 PM
#7
Member
Join Date: Oct 2009
Location: Omaha, NE
Posts: 120
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0L 6cyl
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.
Trending Topics
10-09-2009, 02:07 PM
#12
CF Veteran
Join Date: Mar 2009
Location: Loomis,California
Posts: 8,712
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1987
Model: Cherokee
Engine: 242 inline six
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
10-09-2009, 02:20 PM
#13
Member
Join Date: Oct 2009
Location: Omaha, NE
Posts: 120
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0L 6cyl
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.
10-09-2009, 02:27 PM
#15
Member
Join Date: Oct 2009
Location: Omaha, NE
Posts: 120
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0L 6cyl
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.
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.
Last edited by brandon402; 10-09-2009 at 02:31 PM.