1994 ZJ ECU Help - JeepForum.com
 
LinkBack Thread Tools
post #1 of 2 Old 04-17-2013, 08:09 PM Thread Starter
mholmes7979
Registered User
1994 ZJ 
 
Join Date: May 2012
Location: Spring
Posts: 46
1994 ZJ ECU Help

First I have done everything on the "Dirty Dozen" suggestions forum including changing the three capacitors on the ECU. I have a Grand Cherokee Laredo, 2wd, 4.0L which has had the following replaced. O2, IAC, TPS, MAP sensor. All electoral connections inspected & cleaned. Temp gauge & oil pressure sending unit replaced as well although I don't think they have anything to do with the sudden bucking, and stalling problem.

I did notice if you play with the gas pedal when it tries to stall that it will keep running and not stall. This led me to look a little harder at the TPS (remember it is new). In my poorly written after market manual it has you unplug the TPS and check to see if there is 5v on the two outside connections (ignition must be in the on position). I have 7.3v ? That seemed a we bit high and after turning the ignition switch off I still have 3.2v? Again looking at my poorly written manual I see 12v goes to the ECU and 5v goes to one of the connections on the TPS connector.

Has anyone seen this before? Is this a bad ECU?

mholmes7979 is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 04-17-2013, 08:13 PM
znm1994
Registered User
1996 ZJ 
 
Join Date: Sep 2012
Posts: 148
could be ecu. i had this issue with my 96. went through and changed everything from fuel filter map iac tps coil plugs wires cap and rotor and still acting up... the next day i went and got a PCM(ECU) whatever you want to call it, from my local junk yard. $30 and shes been running great for the last two months.
znm1994 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



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