89 Cherokee Sudden Loss Of Power. - Page 2 - JeepForum.com
Reply
 
LinkBack Thread Tools
post #16 of 29 Old 05-07-2009, 11:32 PM Thread Starter
HankyDanky
Registered User
1989 XJ Cherokee 
 
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 595
Quote:
Originally Posted by 1deadeye View Post
Here is a link for the Renix ignition. It shows you testing for the renix ignition.

http://jeep.zerok.ru/index.php?page=21

Is your exhaust plugged. Bad cat.
Scott
Hey thats alot of great information!! Thanks alot man, gave me some good ideas. I have literally almost checked everything and have not found the problem yet. Cat, exhaust, every thing is new. Double checked it again by by pulling the front pipe and seeing if the power would come back. Nada. Thanks alot though.


1989 Cherokee 4.0l, Rubicon Express 4.5" XJ Super-Flex System, 33x12.50x15 KM2's

The XJ Rebuild- http://www.jeepforum.com/forum/f22/m...build-1327643/

People are always grabbing the handles, clutching the seat, or stomping an imaginary brake peddle when we're out having fun.
HankyDanky is offline  
Sponsored Links
Advertisement
 
post #17 of 29 Old 05-08-2009, 08:46 AM
dover21
Registered User
2007 JK Wrangler 
 
Join Date: Feb 2009
Location: Enterprise
Posts: 2,296
Are the brake pads in contact with the rotors? That kind of friction could definitely hamper any smooth and powerful acceleration.
dover21 is offline  
post #18 of 29 Old 05-08-2009, 08:50 AM
cbordea
Registered User
1998 XJ Cherokee 
 
Join Date: Nov 2008
Location: NC
Posts: 734
yeah, i had a problem similar one time and realized my ebrake was on ;-)

88 MJ I6 4x4 Stock my hauler - Sold
98 XJ I6 4X4 Stock my son's DD
06 12V Purple Barbie Jeep my daughter's DD :-)
cbordea is offline  
post #19 of 29 Old 05-08-2009, 11:32 AM
88XJSport
Registered User
 
88XJSport's Avatar
1988 XJ Cherokee 
 
Join Date: Jul 2005
Location: Michigan
Posts: 4,324
What is the input/output voltage on the TPS, and is it adjusted according to the FSM?

What is your PSI at the fuel rail? 31psi is minimum needed.
88XJSport is offline  
post #20 of 29 Old 05-08-2009, 11:35 AM
Finallyajeep
Registered User
2000 XJ Cherokee 
 
Join Date: Sep 2008
Location: Philadelphia, PA
Posts: 1,207
Hows your air filter?

Firefighters Jeep Club
Finallyajeep is offline  
post #21 of 29 Old 05-08-2009, 11:39 AM
MA88XJDude
Registered User
1988 YJ Wrangler 
 
Join Date: May 2008
Location: Sturbridge
Posts: 583
sounds like when my cat was getting clogged

88' YJ/CJ Turbo Diesel
MA88XJDude is offline  
post #22 of 29 Old 05-08-2009, 11:53 AM
88XJSport
Registered User
 
88XJSport's Avatar
1988 XJ Cherokee 
 
Join Date: Jul 2005
Location: Michigan
Posts: 4,324
Quote:
Originally Posted by MA88XJDude View Post
sounds like when my cat was getting clogged
He said his was clear.
88XJSport is offline  
post #23 of 29 Old 05-08-2009, 12:54 PM
1deadeye
Registered User
1988 XJ Cherokee 
 
Join Date: Feb 2009
Location: Wi
Posts: 45
Quote:
Originally Posted by HankyDanky View Post
Hey thats alot of great information!! Thanks alot man, gave me some good ideas. I have literally almost checked everything and have not found the problem yet. Cat, exhaust, every thing is new. Double checked it again by by pulling the front pipe and seeing if the power would come back. Nada. Thanks alot though.
Any time. Let us know what you find. So I can had it to my ever forgetful memory.

Scott
1deadeye is offline  
post #24 of 29 Old 05-08-2009, 02:01 PM Thread Starter
HankyDanky
Registered User
1989 XJ Cherokee 
 
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 595
Quote:
Originally Posted by dover21 View Post
Are the brake pads in contact with the rotors? That kind of friction could definitely hamper any smooth and powerful acceleration.
No the brakes suck as it is with the 33's so thats not it.

Quote:
Originally Posted by cbordea View Post
yeah, i had a problem similar one time and realized my ebrake was on ;-)
.

lol, E-Brake is def. not on

Quote:
Originally Posted by 88XJSport View Post
What is the input/output voltage on the TPS, and is it adjusted according to the FSM?


What is your PSI at the fuel rail? 31psi is minimum needed.
I got a reading of .827 when you divide the output by the input and optimal is .830. Can be between .825 and .835

PSI was 41 so its all good.

Quote:
Originally Posted by Finallyajeep View Post
Hows your air filter?
Air filter is clean.

1989 Cherokee 4.0l, Rubicon Express 4.5" XJ Super-Flex System, 33x12.50x15 KM2's

The XJ Rebuild- http://www.jeepforum.com/forum/f22/m...build-1327643/

People are always grabbing the handles, clutching the seat, or stomping an imaginary brake peddle when we're out having fun.
HankyDanky is offline  
post #25 of 29 Old 03-11-2011, 09:39 AM Thread Starter
HankyDanky
Registered User
1989 XJ Cherokee 
 
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 595
Figured I would update this, when I installed the new TPS there is a bar that moves when the throttle opens/closes which in turn provided the correct air/fuel ratio. The lever was not catching on the bar, which in turn made the computer think that the throttle body was closed all the time. Result? NO POWER! lol, So make sure if you install one, that it is put in correctly. Thats all!

1989 Cherokee 4.0l, Rubicon Express 4.5" XJ Super-Flex System, 33x12.50x15 KM2's

The XJ Rebuild- http://www.jeepforum.com/forum/f22/m...build-1327643/

People are always grabbing the handles, clutching the seat, or stomping an imaginary brake peddle when we're out having fun.
HankyDanky is offline  
post #26 of 29 Old 03-11-2011, 11:32 AM
Topgun514
Registered User
1988 XJ Cherokee 
 
Join Date: Jul 2006
Location: Salt Lake City, UT
Posts: 1,798
Quote:
Originally Posted by HankyDanky View Post
Figured I would update this, when I installed the new TPS there is a bar that moves when the throttle opens/closes which in turn provided the correct air/fuel ratio. The lever was not catching on the bar, which in turn made the computer think that the throttle body was closed all the time. Result? NO POWER! lol, So make sure if you install one, that it is put in correctly. Thats all!
I did this too...duhhh


but I hope 2 years later he figured out the issue.

87 XJ pioneer-Totalled
96 XJ Sport- Sold
Now: 88 RENIX 4.0 XJ, Project Overlander
3.5" Lift, RE SF LCA's with skids, 31x10.50R15 Duratracs, ARB Roofrack, Custom Bumper, Glasspack, Bored TB, Custom seats
Topgun514 is offline  
post #27 of 29 Old 03-11-2011, 09:01 PM Thread Starter
HankyDanky
Registered User
1989 XJ Cherokee 
 
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 595
Quote:
Originally Posted by Topgun514 View Post
I did this too...duhhh


but I hope 2 years later he figured out the issue.
Ha, yeah it didn't take me more than a couple days and a lot of headaches to figure it out. Just haven't been on the forum in forever..

1989 Cherokee 4.0l, Rubicon Express 4.5" XJ Super-Flex System, 33x12.50x15 KM2's

The XJ Rebuild- http://www.jeepforum.com/forum/f22/m...build-1327643/

People are always grabbing the handles, clutching the seat, or stomping an imaginary brake peddle when we're out having fun.
HankyDanky is offline  
post #28 of 29 Old 03-11-2011, 10:48 PM
my2monkeys
Registered User
1989 XJ Cherokee 
 
Join Date: Jan 2007
Location: Mission Viejo CA
Posts: 89
So the tang on the TPS wasn't on the correct side of the Thottle body tang?

I'm surprised it accellerated at all.

It shifted thru gears with an at idle input to the TCU is also something I wouldn't expect.

Thanks for posting up with your fix.

wifes 95zj 4.0 42re np249 201,000mi

mine 89 xj 4.0 aw4 np242 445,000mi

nephews 98 zj laredo 4.0 2WD 213690mi
my2monkeys is offline  
post #29 of 29 Old 03-11-2011, 11:03 PM Thread Starter
HankyDanky
Registered User
1989 XJ Cherokee 
 
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 595
Yeah it was really strange.. When you put the TPS in, you have to almost angle to catch that bar. If you don't it will sit on top of it and will not do ya any good.

1989 Cherokee 4.0l, Rubicon Express 4.5" XJ Super-Flex System, 33x12.50x15 KM2's

The XJ Rebuild- http://www.jeepforum.com/forum/f22/m...build-1327643/

People are always grabbing the handles, clutching the seat, or stomping an imaginary brake peddle when we're out having fun.
HankyDanky is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
89 Cherokee 4.0 severe power loss & backfire! mondojeep XJ Cherokee Technical Forum 16 06-05-2014 10:08 AM
engine sudden loss of power and strong fuel odor Codetalker XJ Cherokee Technical Forum 4 09-07-2009 10:30 PM
Sudden loss of power MN_Sasquatch XJ Cherokee Technical Forum 1 08-30-2006 02:23 PM
1990 Cherokee Pioneer Power Loss osurferx XJ Cherokee Technical Forum 5 08-15-2006 05:24 PM
Sudden Power Loss? lordsith XJ Cherokee Technical Forum 5 11-19-2004 03:33 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome