Question about 1993 Mitsubishi Expo 4 Door

1 Answer

'93 expo lrv 2.4L rough idle/2 cylinders missing

My sister-in-law has a '93 expo lrv 2.4L SOHC and the computer was replaced due to a no-start condition. And it fixed that problem and ran fine then a few weeks later she overheated it and warped the head and valves. I fixed that put it back together with a new timing belt and it ran fine for a couple of weeks. And then one morning it would turn over but not start. I checked the usual (fuel, air, spark, compression). And noticed that the spark was real weak so I figured it was more then likely the coil even though the ohms tested fine on the primary and secondary side. So I changed the whole distributer because I couldn't buy the coil individually plus it came with the power transistor, and I went ahead and changed the plugs and wires to give it a complete ignition tune-up. That made the spark a lot stronger and it started, but cylinders 2 and 3 were dead so it was only running off of two cylinders, surprisingly. I double checked my valve timing & ignition timing they were fine, All cylinders have great spark at the spark plug end of the wires, I know it is getting fuel because the plugs in cyl. 2&3 are getting soaked with fuel (I keep cleaning them off so I know they are not getting fuel fouled), and I double checked my compression and all were at about 135-140psi. What I find weird is that when the engine is cold (about 35- 40 degrees) the engine will idle at about 1000 rpm until it warms up and then it will idle at around 300-600rpm and die or go into a real low idle (about 100-200 rpm) and then go back up if it doesn't die to about 300-600 rpm if you rev it up and let of the gas. While it is idling at 1000 if you take of a plug wire on 2&3 it doesn't effect it so I know the cylindes are still dead at that speed to. Furthermore, I double checked that my rotor wasn't 180 degrees out. This one has got me stumped so if anyone has an idea of what it is please let me know. Sorry about how long this is but I figure the more info you have the easier it will be to diagnose.

Posted by on

  • aroberts Nov 16, 2008

    I'll take a look at the rockers today. And replace the plugs again cause there only about five bucks. And if that doesn't work I guess the pick-up must be suspect. If the pick-up was faulty do you think it would still fire on two cylinders?

  • aroberts Nov 18, 2008

    Looked at cap & checked the rockers, and it has spark between the cap and wires and between the wires and plugs.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 393 Answers

My brain hurts the only thing i can say is either the spark plugs are cracked or gap is closed, or the dist.pick-up is faulty/cap. poss.a bent push-rod on 2&3 exhaust valves this would show good compression but valve never opens to release exhaust. pull v/c and watch rocker arms. good luck please let me know how it goes.

Posted on Nov 16, 2008

  • darin brown Nov 16, 2008

    usually its all or none. inspect cap carefully/looking at each contact put spark tester between wire and cap.

×

6 Suggested Answers

  • 109 Answers

SOURCE: Fuel filter location on a 1994 Mitsubishi Expo LRV 2.4

it is an internal fuel pump located underneath the back seat..

Posted on Dec 04, 2008

  • 2920 Answers

SOURCE: Spark plug gap

0.10 should be the correct setting

Posted on Dec 25, 2008

  • 973 Answers

SOURCE: changed computer in 1992 expo lrv and engine runs

You need to pull the code out with a OBD I scanner to determine what code is being set.

Posted on Jun 03, 2010

  • 834 Answers

SOURCE: wiring diagram for the distributor cap of a 92

Here is a firing order diagram if that is what you are looking for?


0d3c7ec.jpg

Posted on Jun 19, 2010

  • 90 Answers

SOURCE: Instructions to replace fuel filter of a 1994

Relieve the fuel rail pressure by removing the fuel pump fuse, then cranking the engine for a few seconds until it is clearly not receiving any fuel. Next let off the pressure in the fuel tank by removing then replacing the fuel filler cap. Next unfasten the special connectors which join the fuel line to either side of the fuel filter and disconnect the lines, keeping a rag handy to catch the fuel which will spill out of the lines and filter. Remove the fuel filter mounting bracket bolts/screws then replace the filter. Reassembly is the reverse of removal.

Posted on Mar 21, 2011

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What parts do I need to fix the Egr system on my 1994 Mitsubishi Expo LRV 2.4?


depends on what is found to be faulty
solenoid , valve or body

Oct 26, 2016 | 1994 Mitsubishi Expo

1 Answer

I have a 1996 Ford Explorer 5 speed six cylinder 4 wheel drive feels like when I put on a gas is losing powers


4.0l Engine loss of power. Garage has no idea. - Ford Explorer and ...

www.explorerforum.com > ... > Elite Explorer 911!

May 17, 2010 - 19 posts - ‎11 authors
4.0l Engine loss of power. ... 1996 Explorer XLT Supercharged 347 w/ BW4406 Build Thread, 8000K ... 1999 Ford Explorer Sport [new playtoy] Intermittent loss of power
11 posts
Feb 9, 2013
93 4.0 expo rough idle power loss ((PLEASE HELP))
19 posts
Nov 12, 2011
Sputter/Stutter and Loss of Power
19 posts
Jun 2, 2010
Loss of Power on Hills (NEED HELP!)
11 posts
Apr 9, 2009
More results from www.explorerforum.com

Dec 25, 2015 | Ford Cars & Trucks

1 Answer

My 93 Chevy truck 4.3 has a miss in it I replaced the plugs,wires ,distributor ,and rotor .and all of the filters ,and belts . And still have the same miss in it ? It starts perfect but idles rough .


you could have a burnt valve on the cylinder that's misfiring ! Do a compression test ! could have bad fuel injector ! What type of fuel injection does yours have TBI - throttle body injection , MFI - multiport fuel injection . Pull plug wires one at a time to see what cylinder is not contributing !

Apr 26, 2015 | Chevrolet Cars & Trucks

1 Answer

Ford Taurus idle missing


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues.Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----
Bad miss at idle? http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------
Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------
1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------
Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------
Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------
Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

-----------
GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------
1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------
Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------
Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------
While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------
Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------
High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------
Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------
Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

-----------
While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Nov 24, 2012 | 2001 Ford Taurus

1 Answer

Wiring diagram for the distributor cap of a 92 mitsubishi expo LRV


Here is a firing order diagram if that is what you are looking for?


0d3c7ec.jpg

Jun 19, 2010 | 1992 Mitsubishi Expo

2 Answers

Spark plug gap


0.10 should be the correct setting

Dec 25, 2008 | 1992 Mitsubishi Expo

1 Answer

Fuel filter location on a 1994 Mitsubishi Expo LRV 2.4


it is an internal fuel pump located underneath the back seat..

Dec 04, 2008 | 1994 Mitsubishi Expo

1 Answer

Proper transaxle fluid?


i believe it takes dextron (regular automatic trans fluid) check on dipstick to make sure

Oct 25, 2008 | 1993 Mitsubishi Expo 4 Door

Not finding what you are looking for?
1993 Mitsubishi Expo 4 Door Logo

413 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts

yadayada
yadayada

Level 3 Expert

63242 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Mitsubishi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...