Question about 2004 Mitsubishi Endeavor

1 Answer

Rough idle Last night I started my 2004 Mitsubishi Endeavor (83,000 miles) and the engine would not idle smoothly. It will oscillate from about 300 to 500 rpm before stabilizing @ 500 rpm or stalling. Idle "seems" to be a little low. This is a constant problem now. It will run smoothly after I get it stabilized at idle. But idle seems to be a problem. I am trouble shooting fuel and or timing. Thoughts?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I took mine in to change the plugs and they said there are four O2 sensors in the fuel mixture system and two were bad. I didn't replace them since they were a little pricey ($500 to replace both) and I have 103,000 on the car. Has very similar roughness and occasional oscillations, but no stalling. Hope this helps.

Posted on Aug 25, 2008

  • Tom Jul 12, 2011

    Am having the same problem after having replaced the battery, and then alternator. Any suggestions on what to look at next?



1 Suggested Answer

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

2004 mitsubishi endeavor speedometer, tachometer and temp gauge are all not working. how could I fix it?

Hi, I would think it either has a blown fuse or more likely would need a replacement instrument panel installed. Could be $100 to $300 used for the part depending on where you get it. Installing it would probably be 1 or 2 hours labor if you do not know how to.

Mar 18, 2015 | 2004 Mitsubishi Endeavor

1 Answer

Transmission lagging

you have a faulty safety neutral switch, runs about $75

Dec 09, 2013 | 2004 Mitsubishi Endeavor

1 Answer

Changed water pump & timing belt last night. Car ran fine at idle and test drive. Wife went on errands this morning and after the last stop. Car would not re-start. Could the timing belt skip a tooth...

Just a thought that the belt could slip if the tensioner did not locate properly. Seems too coincidental that it is not related to the timing belt.

Jan 15, 2013 | 2000 Mitsubishi Montero Sport

1 Answer

Traction light and check engine light on 2004 Mitsubushi Endeavor

mean loosing power. check the coil(s). deffective coil or coils affect engine performance and loose its power. and engine has rough idles. and check TPS.

Mar 03, 2012 | Mitsubishi Cars & Trucks

1 Answer

2005 Mitsu Endeavor p0506 Idle Air control.

Idle air control is not a sensor on the air horn.Why do people who have no clue bother answering? The idle speed is controled by the throttle body which allows a specific amount of air to flow into the engine thus controlling your idle speed. In this application it is an integral aspect of your throttle body. Check your throttle body for contamination. Check your wire harness connecters.

May 28, 2010 | 2004 Mitsubishi Endeavor

1 Answer

My hyundai xg350 2004 was running smoothly with no problems at all, then out of nowhere the check engine light came on and now my car won't accelerate at all. All it will do is idle (which I had to do to...

how many miles were on it when you got it? it could be the throttle position sensor. go to an auto parts store like autozone or advanced auto parts and have them run a scanner , no cost , to see if there is a code to verify this. if this helps please reply as this helps me answer your questions here and good luck

May 03, 2010 | 2004 Hyundai XG350

1 Answer

2004 endeavor stalls and won't start. If I wait a while I can start and drive it again. Doesn't seem to have any pattern on when it will stall again.

How many miles? What grade fuel are you using? Have you ensured your air filter is clean? Do you get a check engine light? If so, have you taken it to autozone to pull the codes for free?

Nov 08, 2009 | 2004 Mitsubishi Endeavor

1 Answer

Timing Belt for 2004 Mitsubishi Endeavor

Yes, I would replace it according to the owner's manual. Could be very expensive if it breaks.


May 31, 2009 | 2004 Mitsubishi Endeavor

1 Answer

V6 engine idles rough after restarting, then smooths out

My first guess would be a dirty carb/fuel injector set. Run some fuel cleaner through the tank and see if it gets better. You might have to do it through a couple of tanksful. How long since you've had a tune-up? It might just be that time.

Nov 15, 2008 | 1993 Toyota Pickup

Not finding what you are looking for?
2004 Mitsubishi Endeavor Logo

1,157 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts


Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

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

Answer questions

Manuals & User Guides