Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 06-18-2013, 05:00 PM
Member
My Jeep: 2002 4.7 HO WJ
 
Join Date: May 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 483
Kevlar is on a distinguished road
Combustion chamber cleaner

Hi
I have a 4.7 HO Overlander 2002 it has a problem and I am looking for some advice. It has a misfire at cylinder No1. Must admit I don't want to dive in yet and remove cylinder heads to get at the valves. I heard about combustion chamber cleaner as a start. It has low compression at this cylinder down to 120 the engine warning light is on. No bad noises from within the engine it sounds great other than this slight problem.
Starts perfect no smoke has been converted to run on LPG.
Any advice would be appreciated as I would like to restore this great beast to its former glory.
Thanks Kevlar
__________________

__________________
Reply With Quote
  #2  
Old 06-18-2013, 05:23 PM
Trav1s's Avatar
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: Apr 2012
Location: Cedar Rapids, IA
Posts: 723
Thanks: 14
Thanked 20 Times in 19 Posts
Rep Power: 1687
Trav1s has a reputation beyond reputeTrav1s has a reputation beyond reputeTrav1s has a reputation beyond reputeTrav1s has a reputation beyond reputeTrav1s has a reputation beyond reputeTrav1s has a reputation beyond repute
Garage
Re: Combustion chamber cleaner

I am not sure how you would used a combustion chamber cleaner other than running in through the intake or through the fuel system. I have used BG44K and Seafoam on my vehicles - both through the fuel system and a bit through the intake through a vacuum hose. Both will break down carbon build-up in the engine. I used Seafoam in the gas in a 1966 John Deere 110 tractor with an 8 HP Kohler motor. It cleaned up the carbon so well that it caused the old head gasket to leak. These are a "do at your own risk" procedures.
__________________

__________________
2004 Columbia Edition WJ 4.7 HO
RB4/Moog HD Steering Stabilizer/PML trans pan 10304/OME 10MM Spacers/Bilstein shocks/Rubicon Moabs/255/65r17 Cooper Discoverer AT3/Factory chrome tow hooks/Mopar hitch & a loose nut behind the wheel
Reply With Quote
  #3  
Old 06-19-2013, 07:02 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,809
Thanks: 9
Thanked 75 Times in 70 Posts
Rep Power: 525741
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Combustion chamber cleaner

You can try a seafoam treatment and see if that helps. When not, remove the cylinder head cover and check for a fallen of rocker arm. Carbon buildup on the valve stem could let it hang up a bit, with as a result that the rockerarm can just simply fall of. An other possibility is a dropped valve seat, which also causes the rocker arm to fall of.
Here you see how to seafoam it: Sea Foam Treatment
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #4  
Old 06-22-2013, 09:43 AM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2350
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
Check spark plug if cylinder 1 is low its possibly time for gasket

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #5  
Old 06-22-2013, 02:51 PM
Member
My Jeep: 2002 4.7 HO WJ
 
Join Date: May 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 483
Kevlar is on a distinguished road
Re: Combustion chamber cleaner

Hi Travis
Thanks for the reply.
Got me scared now was looking for a quick easy fix to my problem but now not sure about this sea foam may just dive in and rip it apart. will post my decision.
thanks Kevlar
__________________
Reply With Quote
  #6  
Old 06-22-2013, 03:05 PM
Member
My Jeep: 2002 4.7 HO WJ
 
Join Date: May 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 483
Kevlar is on a distinguished road
Re: Combustion chamber cleaner

hi Hoffmanestates
Thanks for the reply, for the hell of it I will try a new spark plug and a coil pack to cylinder 1 but think you are correct about gasket, am also worried about valves or valve seat apparently the seat can also drop out. sounds bad a.
Will post the outcome.

Thanks Kevlar
__________________
Reply With Quote
  #7  
Old 06-22-2013, 03:46 PM
Member
My Jeep: 2002 4.7 HO WJ
 
Join Date: May 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 483
Kevlar is on a distinguished road
Re: Combustion chamber cleaner

Hi Frango100
Great reply I am up for trying anything rather than removing cylinder heads so am now going to try sea foam after seeing those posts you put me on to. Nothing to lose or do I. what further damage can it do, fix it or not ?
Will let you no the outcome

Thanks Kevlar
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

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
Best Upholstery Cleaner? ONEbadHEEPtruck Detailing 20 01-24-2012 07:49 PM
Leather cleaner kaflyboy Detailing 20 08-16-2011 09:28 PM
Headliner Cleaner Mr. Boh Grand Cherokee - WK 9 06-14-2011 01:23 AM
Seat Cleaner? HELP?!?!?!? ONEbadHEEPtruck Detailing 2 04-11-2011 09:52 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community