AW4 Problems - JeepForum.com
 
LinkBack Thread Tools
post #1 of 15 Old 02-07-2011, 03:22 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
AW4 Problems

So driving home to Ohio from Memphis yesterday I got a CEL. I didn't pay much attention to it because I have a o2 sensor that likes to throw a code sometimes.. As I was going through the mountains the CEL started to flash repeatedly as I was going up and down the hills and would stop flashing when the road leveled out. I then started to hear some rattling and then a faint grinding noise from under the floor boards whenever I would let off the gas and get back on it. I stopped at auto zone and had the codes read today it threw 5 codes...
1.multiple misfires
2.misfire in #2 cylinder
3.misfire in #5 cylinder
4. o2 sensor
5.transmission control cylinder

Fluid is black and smells burnt I've owned the Jeep for about 9 months and have never changed the fluid and have no idea if the PO did..

I made an appointment at the local transmission shop for thursday but am just curious what kind of trouble I might be in..

My Heep is a 00' I6 aw4 D30/35 199k miles..

4low4fun is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 02-07-2011, 03:28 PM
bds5
Registered User
2006 TJ Wrangler 
 
Join Date: Aug 2010
Location: dallas, texas
Posts: 377
Doesnt sound good. I will be watching your thread, I do think you can buy used tranny and do the work yourself alot cheaper a whole lot cheaper. Good Luck
bds5 is offline  
post #3 of 15 Old 02-07-2011, 03:31 PM
xjfever
Web Wheeler
 
xjfever's Avatar
1995 XJ Cherokee 
 
Join Date: Feb 2008
Location: north Ga.
Posts: 14,216
The flashing CEL is for the misfire problem. You likely overheated the tranny going through the mountains. That is the fastest way to kill the AW4, but that doesn't mean yours is dead. The new fluid may fix it, but it may not.

  1. '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
  2. Sold'99 WJ limited, 4.7L, 3" IRO lift. Bilstein shocks, JK rubicon wheels, 255/70/17's, carolina driveshaft, IRO adjustable control arms, IRO adjustable A-arm
  3. Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
xjfever is offline  
post #4 of 15 Old 02-07-2011, 03:43 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
There's several guys on craigslist with used trany's, all for around $250. I can definetly change it myself, I just don't much about automatics and am more or less going to use the shop to find out exactly what's wrong..

Now I wonder what's causing the misfires.. I changed the engine back in July and put new EVERYTHING on it when I did...
I hate it! everytime I get enough money together for a lift and tires I have to sink a bunch of loot into it...
4low4fun is offline  
post #5 of 15 Old 02-07-2011, 04:01 PM
xjfever
Web Wheeler
 
xjfever's Avatar
1995 XJ Cherokee 
 
Join Date: Feb 2008
Location: north Ga.
Posts: 14,216
You haven't had any coolant loss have you?

  1. '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
  2. Sold'99 WJ limited, 4.7L, 3" IRO lift. Bilstein shocks, JK rubicon wheels, 255/70/17's, carolina driveshaft, IRO adjustable control arms, IRO adjustable A-arm
  3. Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
xjfever is offline  
post #6 of 15 Old 02-07-2011, 04:09 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
Quote:
Originally Posted by xjfever View Post
You haven't had any coolant loss have you?
Nope.. engine runs strong too..
4low4fun is offline  
post #7 of 15 Old 02-07-2011, 04:23 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,742
A "flashing" check engine light indicates a serious misfire, which if ignored, will destroy your catalytic converter.

*What brand plugs are you running? Stay away from Bosch

*Keep an eye on the coolant reservoir. You don't mention if you still have the "infamous" 0331 cylinder head on your engine, which is more prone to cracking than others, which can lead to coolant loss and mixing with the oil and can also lead to misfires

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #8 of 15 Old 02-07-2011, 05:00 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
Auto lite plugs.
I'm not losing any antifreeze and the oil is clean. I kind of thought the bad 02 sensor was causing the misfires?
as far as misfires I never even knew it had misfired until I saw the code. it never hesitated/sputered anything..
4low4fun is offline  
post #9 of 15 Old 02-07-2011, 05:04 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
In my original post i had mentioned the fluid being black, I was talking about the transmission fluid. just to clearify
4low4fun is offline  
post #10 of 15 Old 02-08-2011, 09:13 AM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
Bump
4low4fun is offline  
post #11 of 15 Old 02-08-2011, 09:38 AM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,742
If you have a P0300 random misfire code, it means the misfire is random and is moving around from cylinder to cylinder.

The cause here would likely be something COMMON to the entire engine, that upsets the engine's air/fuel mixture, such as a major vacuum leak, or unusually low fuel pressure (weak pump or faulty pressure regulator).

Start by searching for a vacuum leak and also verifying fuel pressure with a gauge on the fuel rail. For a 2000, you should have 49 psi, plus or minus 5 psi. The only accurate way of verifying fuel pressure is with a gauge.

Here are some other "possibilities" from the OBDII website.

Faulty spark plugs
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Faulty camshaft position sensor
Defective computer

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #12 of 15 Old 02-08-2011, 07:26 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
Quote:
Originally Posted by tjwalker View Post
Here are some other "possibilities" from the OBDII website.

Faulty spark plugs
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Faulty camshaft position sensor
Defective computer
I'm going with my O2 sensor is causing it.. It's bad anyway so I'll start by changing that..

So took the Jeep out to Dad's today. After doing some tinkering and letting him drive it we came to the UNproffesional conclusion that it's the torque converter....... Still have an appointment with the shop on Thursday morning to let them do a proper diagnosis.

So I found a transmission from Stricker Brothers (salvage yard near here that has great prices and warranties thier stuff) they have several tranny's the one I have my eye on is $275 and has 88k miles on it.
Auto zone sales torque converters for $150.
my Jeep is about to turn 200k in like 750 miles.
so what do you guys think? if it indeed is the torque converter change the whole tranny or just change the converter??
4low4fun is offline  
post #13 of 15 Old 02-09-2011, 04:28 AM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,742
Transmission diagnosis can be very tricky.

I'd see what the tranny shop has to say.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #14 of 15 Old 02-09-2011, 04:51 PM
waterdowg
Registered User
1984 CJ7 
 
Join Date: Mar 2009
Location: nj
Posts: 2,393
Replace plugs with plain old Champion plugs. Nothing special just cheap ones. From my 22 years of driving jeep with either the 4.2 or the 4.0 all run better on champion.
waterdowg is offline  
post #15 of 15 Old 02-10-2011, 03:25 PM Thread Starter
4low4fun
Registered User
2000 XJ Cherokee 
 
Join Date: Apr 2010
Location: Dayton, OH
Posts: 119
Quote:
Originally Posted by waterdowg View Post
Replace plugs with plain old Champion plugs. Nothing special just cheap ones. From my 22 years of driving jeep with either the 4.2 or the 4.0 all run better on champion.
good to know
4low4fun 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
98 cherokee, replaced steering box with a 99 box & nothing but problems BAD PROBLEMS 4x4xjCREW XJ Cherokee Technical Forum 5 01-05-2010 01:03 PM
window and locks problems electrical problems? mike243 MJ Comanche Technical Forum 1 04-05-2009 06:39 PM
problems with my TC xj 98/yj 94 XJ Cherokee Technical Forum 1 12-20-2008 01:46 AM
1989XJ problems, (pressure plate, ABS problems) charlescho XJ Cherokee Technical Forum 0 04-11-2008 07:52 PM
4-wheel Drive problems, odd problems Dana44 XJ Cherokee Technical Forum 6 12-09-2005 08:13 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