Key on clicking sound, rough idle on cold start, pcm resetting itself - JeepForum.com
 
LinkBack Thread Tools
post #1 of 3 Old 10-10-2009, 05:36 PM Thread Starter
nshock
Registered User
2000 TJ Wrangler 
 
Join Date: Sep 2008
Location: Hanover, PA
Posts: 16
Key on clicking sound, rough idle on cold start, pcm resetting itself

I have a 00 TJ 4.0. Last year I failed emission, but they gave me a one time exception due to my readiness monitors would go from 3 to 4 ready after driving it awhile, however it would reset back to 3 (which I guess are the continuous monitors) after I turned off the key.

Another problem is when key on, I get a clicking sound from the part which I don't know what it is or it's function and whether the clicking sound is normal or indicating a problem.


Also I usually have the key on for 5 seconds or so to prime before starting the engine. If I start it right away, the engine will usually quit. No matter what, if I start it after letting it sit awhile it has a rough idle to it and it feels rough if I gas it. but it does smooth out and the problems goes away.

Now I don't know if some or all of this problem is the result of a faulty pcm not being able to hold it's memory or something else. I did open my pcm and checked the caps and it looked brand new. In fact I noticed the unit was re-manufactured and tested on 08/2007 so it isn't that old.

If someone can help me with this so I can pass emissions.


'00 Jeep TJ - 33x12.5 GY Kevlar MT, Warn Winch, a pocket knife, and duck tape. - 2.5" lift, 1.25" BL, MML, Disco, '98 Dodge 2500 Turbo Diesel - Tow Rig
nshock is offline  
Sponsored Links
Advertisement
 
post #2 of 3 Old 10-10-2009, 05:50 PM
wushaw
Rockin jeep
 
wushaw's Avatar
2000 TJ Wrangler 
 
Join Date: Jan 2007
Location: Texas
Posts: 8,165
So you let this go for a year without trying to fix it?
wushaw is offline  
post #3 of 3 Old 10-10-2009, 05:59 PM Thread Starter
nshock
Registered User
2000 TJ Wrangler 
 
Join Date: Sep 2008
Location: Hanover, PA
Posts: 16
I hardly drive it and usually if I do go some place with it, it's on my trailer being towed by my truck. Yeah but I did neglect it and forgot about it until I pulled out my obd reader and noticed the problem again. I've actually used this forum to help fix numerous of problems from faulty crankcase sensor to doing a self flush of the transmission due to water. It really wasn't on the top of my priority since it really wasn't an inconvenience because ultimately it ran great, but I am stumped and it's why I'm hoping someone might being able to help me so I can pass emission and avoid taking it to the dealer.

'00 Jeep TJ - 33x12.5 GY Kevlar MT, Warn Winch, a pocket knife, and duck tape. - 2.5" lift, 1.25" BL, MML, Disco, '98 Dodge 2500 Turbo Diesel - Tow Rig
nshock 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
2.5 hard start cold, rough idle, sometimes stalls 91wrangler4cyl YJ Wrangler Technical Forum 1 01-01-2010 08:29 AM
1997 2.5 will not start on incline and rough start/idle when cold. BuckeyeTJ TJ Wrangler Technical Forum 0 11-24-2009 09:39 AM
'90 Violent Cold Start Up, Rough Idle, No Vacuum Leaks. Delta347 YJ Wrangler Technical Forum 24 01-03-2009 10:58 PM
Rough Idle on Cold Start rugbynut YJ Wrangler Technical Forum 15 03-13-2008 12:37 PM
clicking sound on an 05 at idle? linuxman TJ Wrangler Technical Forum 15 06-10-2007 03:39 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