Welcome Guest ( Log In | Register )

Mitsubishi-Forums.com > Mitsubishi Models > Montero, Challenger, Pajero & Shogun Forum
     
Mitsubishi-Forums.com - The UNOFFICIAL Mitsubishi Community This site is NOT affiliated in any way with Mitsubishi or any of it's subsidiaries. Our goal is to provide Mitsubishi owners an information outlet - a means to communicate with other Mitsubishi owners. It is simply a community where fans and owners can get the right information for tuning, customization and general discussions on anything about Mitsubishi. You'll find the answer to almost any question about your Mitsubishi in this site. If not, simply join and ask! We have many willing expert members just waiting to answer your questions.

                        
Mitsubishi-Forums.com is not affiliated with or endorsed by Mitsubishi Motors.
 
Reply to this topicStart new topic

Do you like Mitsubishi-Forums.com? Link to us and help spread the word about our forum. Thanks!
> Loss Of Compression, low/no cylinder compression
cheesemercedes
post Dec 8 2004, 07:27 AM
Post #1


Newbie


Group: Members
Posts: 1
Joined: 8-December 04
Member No.: 3,601
Status: Offline
Location: UK
Drives: 1991 Mitsubishi pajero 3.0 v6



worldwidewheeler@hotmail.com[FONT=Arial][SIZE=1]
I have just purchased a 1991 Pajero LWB 3.0 V6
It has a LPG conversion fitted 18mths. ago.
It ran ok down the motorway from the guy I bought it from. But after only 10 days i noticed a missing (judder). It also became obvious it was using huge amounts of fuel giving 5-8 MPG. I brought it to my local garage who serviced it, cahnged filters,plugs, oil and HT leads. But it still had a miss fire. Compression test revealed virtually no compression on no.5 pot. They stripped the head and found some weeping but no burnt or bent valves which was expected. The heads were skimmed and new gaskets fitted. A new cam belt fitted at the same time. Fired up fine and ran on all six. As it warmed up the miss fire stared again. It now only runs on three cylinders. Cannot find any known problem on the internet. Can anyone give advice? I feel very p***ed off :angry: as before deciding on a large vehcle to buy because of easy access following a hip injury I dismissed Range & Landrovers as I read so many reports of serious trouble confining them to garages for months at a time. I read no such info on Mitsubishi, only praise. :huh:
Go to the top of the page
 
QuoteReply
Benckj
post Dec 8 2004, 05:21 PM
Post #2


Expert
Group Icon

Group: Moderator
Posts: 972
Joined: 31-October 04
Member No.: 2,513
Status: Online
Location: Alexandra, New Zealand
Drives: 1997 Pajero GDI



QUOTE(cheesemercedes @ Dec 8 2004, 04:27 AM)
worldwidewheeler@hotmail.com[FONT=Arial][SIZE=1]
I have just purchased a 1991 Pajero LWB 3.0 V6
It has a LPG conversion fitted 18mths. ago. 
It ran ok down the motorway from the guy I bought it from. But after only 10 days i noticed a missing (judder). It also became obvious it was using huge amounts of fuel giving 5-8 MPG. I brought it to my local garage who serviced it, cahnged filters,plugs, oil and HT leads. But it still had a miss fire. Compression test revealed virtually no compression on no.5 pot. They stripped the head and found some weeping but no burnt or bent valves which was expected. The heads were skimmed and new gaskets fitted. A new cam belt fitted at the same time. Fired up fine and ran on all six. As it warmed up the miss fire stared again. It now only runs on three cylinders. Cannot find any known problem on the internet. Can anyone give advice? I feel very p***ed off :angry:  as before deciding on a large vehcle to buy because of easy access following a hip injury I dismissed Range & Landrovers as I read so many reports of serious trouble confining them to garages for months at a time. I read no such info on Mitsubishi, only praise. :huh:
[right][snapback]3251[/snapback][/right]


One thought is that it could be an intermittant problem with the ECU unit which is used for engine management. I am a recent Pajero owner so I don't have allot of knowledge on this but I do know of similiar problems with other makes (Subaru, Holden, etc). Have a look at the attached website from a company which deals with these units. They have a good knowledge of what to check for and common problems with certain makes & years. Good luck and let me know what you find out.

Jim
NZ
www.tunemycar.com

Go to the top of the page
 
QuoteReply
Trev O
post Dec 11 2004, 06:05 PM
Post #3


Full Member
**

Group: Members
Posts: 215
Joined: 18-November 04
Member No.: 2,992
Status: Offline
Location: SI NZ
Drives: Galant MX 93, Pajero 2.5TD 91



and on a more basic level, I guess your garage would have checked for sparks at the plugs and whether petrol is getting to them, etc. Mechanics are suppose to know what makes a car tick and so, if they're confused, then maybe another garage with more ideas would be better..?
Go to the top of the page
 
QuoteReply
  Advanced Search
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

Reply to this topicStart new topic
Get your Mitsubishi listed in the Garage Today, for FREE, to share with the world what you drive and what toys and modifications you have.

Collapse

> Similar Topics

  Topic Replies Topic Starter Views Last Action
No New Posts Offroad?
12 coool46 120 Yesterday, 08:54 PM
Last post by: JWhat89
No new Official Best Forum Quotes Thread!
87 Rob 1,511 26th November 2008 - 02:22 PM
Last post by: pwee05
No New Posts Compression In Motor
4 dburmeister 34 21st November 2008 - 12:53 AM
Last post by: dburmeister
No New Posts Topic has attachmentsOfficial 2009 Ralliart Specs And Options
Official 2009 Ralliart Specs and Options
19 Metal-Lancer08 787 26th September 2008 - 09:22 AM
Last post by: RA4mark
No new Topic has attachmentsOfficial Sign Off Post......
26 98eclipse-rs 174 30th August 2008 - 12:24 PM
Last post by: BigRedMonster

 
 
 
Time is now: 1st December 2008 - 05:16 PM
Mitsubishi-Forums.com is not affiliated with or endorsed by Mitsubishi Motors.