2004 Jeep 4.0L I6 Question... - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by TxOutlaw, this thread has received 7 replies and been viewed 1125 times.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 05-02-2009, 01:42 AM Thread Starter
 
Join Date: Apr 2007
Posts: 114
Points: 1,683
Thanks: 0
Thanked 0 Times in 0 Posts
2004 Jeep 4.0L I6 Question...

2004 Jeep Grand Charokee (WJ) 2WD... Not an off roader, but figured you guys could help!!! The thing has 120K miles and is a road warrior I use for home health... Got it with 88K on it... I had an 02 that didn't lag like this one...

This thing is SLUGGISH between 50-60MPH and 2200-2800RPM... Stock except for K&N drop in and cut up air box... I have done the following:

Tune up, Surp belt, Fuel filter, K&N air filter (cleaned every 5K with oil change), BG products in oil and gas, sea foam in gas...

There is 2 pre-cats and a normal cat... Thinkin about gutting the normal cat and checkin the o2 sensors...

Am I missing something??
TxOutlaw is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 05-04-2009, 02:59 AM
Member
 
Join Date: Dec 2008
Location: Wherever the camper is parked.
Posts: 211
Points: 22,594
Thanks: 9
Thanked 14 Times in 14 Posts
I would check the spark plugs, wires, cap and rotor (if it has a cap and rotor).

Use lots of dielectric grease on the wires.

Put a thin layer of RTV on the base of the cap to seal the water out.

Woody

2001 F-350 Supercab 4x4 Lariat
Real man's trans
ATS exhaust
Gauges
DIY Intake
Tinted Windows
33" Toyo mudders
Captain's Chairs
Woody303 is offline  
post #3 of 8 (permalink) Old 05-04-2009, 03:00 AM
Member
 
Join Date: Dec 2008
Location: Wherever the camper is parked.
Posts: 211
Points: 22,594
Thanks: 9
Thanked 14 Times in 14 Posts
I forgot to mention that you might also want to check your fuel filter and/or fuel pump.

Woody

2001 F-350 Supercab 4x4 Lariat
Real man's trans
ATS exhaust
Gauges
DIY Intake
Tinted Windows
33" Toyo mudders
Captain's Chairs
Woody303 is offline  
post #4 of 8 (permalink) Old 05-05-2009, 11:34 AM
I now drive a Duramax...
 
Join Date: Dec 2008
Location: Tucson AZ
Posts: 318
Points: 32,375
Thanks: 6
Thanked 29 Times in 25 Posts
Tune-up usually covers spark plug and distributer, and he said he did a fuel filter already...

Did you check to see if it's throwing any codes?

2007 Chevrolet 3500 SRW CrewCab Longbed, PPE Modded AirBox, Edge Evo Race level 4.

***SOLD***2001 Dodge 2500 CTD Quadcab Longbed SRW, Straightpiped, BHAF, no silencer ring.


They call it PMS because Mad Cow Disease was taken...
CumminsTorq is offline  
post #5 of 8 (permalink) Old 05-05-2009, 03:54 PM
Member
 
Join Date: Dec 2008
Location: Wherever the camper is parked.
Posts: 211
Points: 22,594
Thanks: 9
Thanked 14 Times in 14 Posts
Do a compression test. It is cheap and easy, and will tell you about the health of the internal components of the engine.

Run a couple tanks of 93 octane fuel with some injector cleaner, it may be a partially plugged injector.

Get a laser thermometer (about $15 at Harbor Freight) and point it at the exhaust manifold right near the head at each exhaust valve, with the engine running. Make sure all the cylinder temps are close.

Woody

2001 F-350 Supercab 4x4 Lariat
Real man's trans
ATS exhaust
Gauges
DIY Intake
Tinted Windows
33" Toyo mudders
Captain's Chairs
Woody303 is offline  
post #6 of 8 (permalink) Old 05-06-2009, 11:35 PM Thread Starter
Threadstarter
 
Join Date: Apr 2007
Posts: 114
Points: 1,683
Thanks: 0
Thanked 0 Times in 0 Posts
I just did the fuel filter this past weekend... I tuned it up about 25K ago... Have yet to check codes but have not had a light come one... I can have the compression checked, by bud has that guage... Thanks for the help!
TxOutlaw is offline  
post #7 of 8 (permalink) Old 05-07-2009, 12:27 AM
shes smart!
 
vanoppen4x4's Avatar
 
Join Date: Jan 2008
Location: e. peoria, IL.
Posts: 161
Points: 16,089
Thanks: 3
Thanked 10 Times in 10 Posts
I would check out the cats, at night drive the jeep around and get it up to temp then get out look at the cats if they are really bad they should be glowing.

2000, F250

SINGLES CLUB #114
RIDIN HIGH CLUB #40

RIDIN DIRTY #46
vanoppen4x4 is offline  
post #8 of 8 (permalink) Old 05-07-2009, 01:37 PM Thread Starter
Threadstarter
 
Join Date: Apr 2007
Posts: 114
Points: 1,683
Thanks: 0
Thanked 0 Times in 0 Posts
Ahh good tip!! Sure drives like a dog... I frequent a jeep forum and they seem to think that its normal... My 02 4.0 was nothing this sluggish!
TxOutlaw is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.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 email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Warranty Question on 2004.5 Sandspyder 5.9L Cummins (2003-2007.5) 12 08-07-2007 02:56 AM
Another jeep to diesel question greenjeepster Diesel Conversion 0 04-25-2007 06:36 PM
1967 Jeep Kaiser pickup and 1987 Jeep Wrangler jktcummins 4X4 Offroad Forum 0 03-12-2007 11:11 PM
1967 Jeep Kaiser pickup and 1987 Jeep Wrangler jktcummins Whats Been Sold 0 03-12-2007 11:08 PM
Leveling Kit for 2004.5 3/4 4X4 Question BaconRind General Dodge Discussion 2 02-18-2007 01:54 AM

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 On
Pingbacks are On
Refbacks are On

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