Help Jeep won't run! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-26-2010, 08:13 PM   #1
Aka Vaultzz

WF Supporting Member
 
Vaultzz's Avatar
 
Join Date: Jul 2009
Location: My Secret Lab
Posts: 5,624
Help Jeep won't run!

Well I never thought I'd be posting one of these threads

Anywho, I jerry rigged some flares (I'll post th pics in the "last person to post" thread) and decided to take it out for a spin. (this is after it was sitting for about a week)

It was idling rough like always but when I got it up to 30 mph it started sputtering like crazy, rpms all over the chart, stuff like that. I figured it was just a hicup so I kept going. then 30 feet down the road it got ok and started running right then it happened again and this time it died.

Long story short I got out and inspected everything and found the back 3" of my CAT was RED HOT.


My freaking cat is clogged again... now this happened before abd I replaced the CAT but I'm fearing that the engine may be ruining them.

So we finally get to my question. What would be causing the CAT to clog like this?

Thanks guys you rock!

__________________
The YJ is in Rebuild Mode
Vaultzz is offline   Quote
Old 06-26-2010, 08:19 PM   #2
Supporting Member

WF Supporting Member
 
schnutzy's Avatar
 
Join Date: Sep 2009
Location: ring side seats to the the country's largest circus
Posts: 28,193
Send a message via AIM to schnutzy
catalytic converters are over rated...

__________________
clinging on to sanity, one motorcycle at a time.
schnutzy is offline   Quote
Old 06-26-2010, 08:23 PM   #3
Aka Vaultzz

WF Supporting Member
 
Vaultzz's Avatar
 
Join Date: Jul 2009
Location: My Secret Lab
Posts: 5,624
Quote:
Originally Posted by schnutzy View Post
catalytic converters are over rated...
Thanks capitan obvious but PA requires them
__________________
The YJ is in Rebuild Mode
Vaultzz is offline   Quote
Old 06-26-2010, 08:27 PM   #4
Supporting Member

WF Supporting Member
 
schnutzy's Avatar
 
Join Date: Sep 2009
Location: ring side seats to the the country's largest circus
Posts: 28,193
Send a message via AIM to schnutzy
Quote:
Originally Posted by Vaultzz View Post
Thanks capitan obvious but PA requires them
then PA is over rated
when was the last time the jeep had a good tune up? try that first, maybe run some seafoam through it and all. you could always just leave off the cat while your trying to get it running again. no need it buying a new one if you know its gona get clogged up. just leave it off so you can get it running. see if there is something you can do to unclog ur current one, then slap it back on. do that till you can figure out exactly what the problem is. but i still say give it a good tune up, make sure its running 100%(well, as 100% as a 21 year old, multi hundred thousand mile engine can be.) even if that isnt the exact problem, i dont see it hurting anything.
__________________
clinging on to sanity, one motorcycle at a time.
schnutzy is offline   Quote
Old 06-26-2010, 08:33 PM   #5
Jeeper
 
tlrrob1000's Avatar
 
Join Date: Jul 2009
Location: Pain is a gift...Fear is not an option!
Posts: 786
Images: 23
Could be a couple of things...tune up, running rich, passing oil so on and so fourth. Like schnutzy said do a tune up, sea foam it, then adjust the carb and then if you are using oil (burning oil) then rebuild it.
__________________
No Bad Days!
tlrrob1000 is offline   Quote
Old 06-26-2010, 10:37 PM   #6
Jeeper
 
hannahuffster's Avatar
 
Join Date: Mar 2010
Location: Joplin, MO
Posts: 402
Images: 1
Just dont run one, take it on and off for inspection...
hannahuffster is offline   Quote
Old 06-27-2010, 01:12 AM   #7
that's what she said

WF Supporting Member
 
jgano23's Avatar
 
Join Date: Oct 2008
Location: \m/-_-\m/
Posts: 16,482
Send a message via AIM to jgano23 Send a message via Yahoo to jgano23
Quote:
Originally Posted by hannahuffster View Post
Just dont run one, take it on and off for inspection...
that is not a good idea. they could result in hefty fines and tickets if you are caught. it is not often that a cop will check for this, but if he does you are in big trouble.




what you are dealing with kind of sounds like a converter meltdown.

Quote:
taken from Allied Muffler
The converter was super-heated due to a raw fuel condition in the exhaust flow. The excess unburned fuel ignited when it struck the hot ceramic catalyst and drove the temperature far above the normal operating condition of the converter. The ceramic catalyst is unable to withstand the extremely high temperature and begins to melt. The ceramic collapses and the converter is destroyed. The melted ceramic may block the exhaust flow and cause additional damage to the engine. A converter glowing red-hot, or evidence of heat discoloration, confirms this situation.

The condition that led to this converter meltdown could be the result of a number of malfunctions including faulty oxygen sensor, an incorrect fuel mixture, worn spark plugs or plug wires, a faulty check valve, incorrect ignition timing, sticking float, faulty fuel injectors or other ignition malfunctions.
jgano23 is offline   Quote
Old 06-27-2010, 01:19 AM   #8
Aka Vaultzz

WF Supporting Member
 
Vaultzz's Avatar
 
Join Date: Jul 2009
Location: My Secret Lab
Posts: 5,624
I hope its something easy like the oxy sensor. The same thing happened to the cat that was on it when I bought it. the inside was molten
__________________
The YJ is in Rebuild Mode
Vaultzz is offline   Quote
Old 06-27-2010, 04:07 AM   #9
Deaky

WF Supporting Member
 
Fweaky's Avatar
 
Join Date: Aug 2009
Location: Central Virginia
Posts: 2,206
Images: 18
Like tlrrob1000 mentioned before the clogged cat is often caused by a rich condition. That could be due to an oxygen sensor. Some folks gut the cat once it clogs and reinstall it.
__________________
Nothing is foolproof to a sufficiently talented fool.
Fweaky is offline   Quote
Old 06-29-2010, 11:30 PM   #10
I Need A Cigarette

WF Supporting Member
 
Sf_Kilo's Avatar
 
Join Date: Apr 2010
Location: Bethel Park, PA
Posts: 514
Images: 4
Hmmmmm.... I'm in PA & I never ran a cat in the WRX and it was always "inspected" without it????
Hell the guy I sold it to still runs it without one???
you should really get to know your mechanic better.... its not like the cops even know what a catalytic converter looks like.....
If you want to be stealth and never get caught EVER just gut the cat out and reinstall.
Sf_Kilo is offline   Quote
Old 06-30-2010, 12:04 AM   #11
Jeeper
 
Join Date: Mar 2010
Location: Buffalo Grove, IL.
Posts: 248
Check your fuel pressure. Blockage in the return line will raise the pressure at the rail causing a rich mixture.
This happened to me twice. Turned out to be the return line hitting the bottom of the tank. I had to cut 1/4 inch of the return line. I also cut it at an angle so if it bottoms out again it won't completely plug the line.
Snuffy115 is offline   Quote
Old 06-30-2010, 12:28 AM   #12
Newb
 
Join Date: Jun 2010
Location: Searsport, ME
Posts: 7
Send a message via Yahoo to Tugboat Dog
Quote:
Originally Posted by Vaultzz View Post
Thanks capitan obvious but PA requires them
<.< >.> Gut it, and find a halfway shady place to inspect it, thats what I used to do in PA....
Tugboat Dog is offline   Quote
Old 06-30-2010, 04:54 PM   #13
Aka Vaultzz

WF Supporting Member
 
Vaultzz's Avatar
 
Join Date: Jul 2009
Location: My Secret Lab
Posts: 5,624
It turns out that my CAT is fine, but my carb is hobbling along with an eyepatch, a wooden leg and some cancer So its time for a replacement

__________________
The YJ is in Rebuild Mode
Vaultzz is offline   Quote
Reply

Tags
catalytic converter

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Jeep towing problem IBHIPRU General Jeep Discussion 6 05-29-2012 07:33 PM
Biggest Jeep Freek Contest!!!! txoutdoorx4 Classifieds Archive 6 02-21-2011 11:48 AM
History of the Jeep. George T. General Jeep Discussion 8 02-04-2009 02:03 AM
post up jeep resto part/accs. catalogs 1987 wrangler YJ Tech Forum 0 09-05-2007 12:42 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 04:27 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC