Results 1 to 13 of 13

Thread: 1995 mighty max - check engine light turns on and off while driving

  1. #1

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64

    1995 mighty max - check engine light turns on and off while driving

    Hey I just got a 1995 mighty max. I passed the California smog test the other day but now my check engine light turns on for a few miles than back off for a few miles. If I turn off the truck when the light is on, it's still on whenever I restart the truck. But, it will turn off after I drive a bit. It doesn't seem to come on when just idling. Any ideas about what might be happening? I don't have the manuals yet... hopefully today I'll get them and also a multimeter to check the ecu codes. Thanks yall.

  2. #2

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64
    oh yea, it's 4g64 2.4l

  3. #3

    Array
    Status
    Offline
    Join Date
    12-21-2013
    Posts
    1,258
    Location

    Maurertown, Virginia
    Vehicle

    1990 Dodge D-50
    Engine

    4G64
    Once you get the voltmeter and manual, the manual will tell you how to hook up to see what the ECU is bitching about. I'm gonna place my bet on the throttle position sensor. The symptoms are identical to a problem I had before replacing my TPS.

    I could be wrong. Let your truck tell ya!

    And welcome to the forum. We demand photographs, here, because we're voyeuristic lunatics. I think it's a little-boy thing, who knows.
    The greatest gift you have to give to the world is that of your own self~transformation.

  4. #4

    Array
    Status
    Offline
    Join Date
    06-15-2014
    Posts
    6,059
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    Hi new95max, welcome to mightyram. To me it sounds like a sensor is on the ropes but hasn't completely failed yet. When the light comes on does it affect the engines' behaviour at all? I'd offer the same advice Roy has put up there for you - grab a manual or google it and see if it'll throw you an error code during a diagnostic run. Doing an ECU check is really easy and doesn't involve the dark magic us mere mortals fear (it is easier if you have a local auto store that offers a full ECU diagnostic and can run a print out for you)

  5. #5



    Array
    Status
    Offline
    Join Date
    07-24-2012
    Posts
    2,363
    Location

    Washington State
    Vehicle

    1986 Mitsubishi Mighty Max
    Engine

    G63B
    Can you reset those by disconnecting battery for a few minutes. Probably after what Roy mentioned also. Those positioners are notorious. The wife's car threw an error on a TP, replaced it and it still throws it occasionally.

  6. #6

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64
    Thanks for the info. I changed my dirty ass air filter (looked so clean and new from the top side upon first inspection but the bottom was as dirty as I've seen!) and the light has not come back on. Got my manual at a used book store today. I'll get the voltmeter soon and let yall know what happens. Post pix soon too.

  7. #7

    Array
    Status
    Offline
    Join Date
    12-21-2013
    Posts
    1,258
    Location

    Maurertown, Virginia
    Vehicle

    1990 Dodge D-50
    Engine

    4G64
    Those dirty~ass air filters will cause some havoc. And it's a reminder that often, the simplest answer actually is the solution.
    The greatest gift you have to give to the world is that of your own self~transformation.

  8. #8

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64
    Yeah another day & 50 miles after the air filter change and everything seems A-OK!

  9. #9



    Array
    Status
    Offline
    Join Date
    07-24-2012
    Posts
    2,363
    Location

    Washington State
    Vehicle

    1986 Mitsubishi Mighty Max
    Engine

    G63B
    We have manuals to download here on the forum also. Glad to see another success story.

  10. #10

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64
    Well crap... The light's back on and off and on and off... Looks like the air filter wasn't the problem. I have my multi meter in the truck now so when the light comes on again I'll be able to check it out. I'll also look into the ECU for signs of corruption.

  11. #11

    Array
    Status
    Offline
    Join Date
    12-21-2013
    Posts
    1,258
    Location

    Maurertown, Virginia
    Vehicle

    1990 Dodge D-50
    Engine

    4G64
    The light doesn't need to be on for you to hook up the voltmeter and get readings. Just follow the book instructions and it will tell you what's wrong. Do let us know what it is, when you find out.
    The greatest gift you have to give to the world is that of your own self~transformation.

  12. #12

    Array
    Status
    Offline
    Join Date
    09-28-2014
    Posts
    17
    Location

    redding, ca
    Vehicle

    1995 Mitsubishi Mighty Max
    Engine

    4G64
    Quote Originally Posted by royster View Post
    The light doesn't need to be on for you to hook up the voltmeter and get readings. Just follow the book instructions and it will tell you what's wrong. Do let us know what it is, when you find out.
    Ok, took a while for me to find an analog voltmeter but the code it's throwing is the o2 sensor. I am really new to diy mechanics and the Chilton manual is confusing the heck out of me. How do I test the sensor to see if i have bad wiring or a bad 02 sensor? could the code be symptomatic of a larger problem??? The truck is starting to burn oil at start up and I'm going through about 1 qt every 1500 mi.

  13. #13



    Array
    Status
    Offline
    Join Date
    03-16-2011
    Posts
    3,803
    Location

    Sacramento, CA
    Vehicle

    1979 Dodge D-50
    Engine

    Chevy V6
    The oil will cause the O2 sensor to go bad. You need to replace the valve guide seals. It's no to hard of a process just time consuming. The trick is to do them one at a time using a good air compressor to keep them from falling into the engine. I have have herd of some people putting a small rope in there and turning the engine over by hand to fill the void. But compressed air with a compression tester adapter is the way to go.
    Members come and members go, But the board keeps track of them.
    Find me on FaceBook
    clicking HERE.

    Or look on YouTube Click Here.
    http://mobilemillwright.com

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •