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Thread: service engine light?

  1. #1
    Join Date
    Jan 2010
    Location
    Evergreen, San Jose (408)
    Posts
    238

    Default service engine light?

    hey anyone know how to pull up the code? i got evo scan and ecu flash but idk what to do from there.

    Edited:
    Updated: 10:19:16
    1 Diagnostic Trouble Codes Found:
    ----------------------------------------------
    P0300 Random Misfire Detected.

    what now?
    Last edited by 03Silver; 03-05-2010 at 11:23 AM.

  2. #2
    Join Date
    Jun 2006
    Location
    Daly City, CA
    Posts
    3,733

    Default

    use the EvoScan. plug the tactrix cable, turn key to Ignition, then open the Evoscan. on the bottom right corner, youll see a button that says "Read DTC" click that to read the code, then to clear the code just click "Clear DTC"
    Posted from my mobile device

  3. #3
    Join Date
    Jan 2010
    Location
    Evergreen, San Jose (408)
    Posts
    238

    Default

    thanks jay...ok the code says...

    Updated: 10:19:16
    1 Diagnostic Trouble Codes Found:
    ----------------------------------------------
    P0300 Random Misfire Detected.

    what now?

  4. #4

    Default

    Quote Originally Posted by 03Silver View Post
    thanks jay...ok the code says...

    Updated: 10:19:16
    1 Diagnostic Trouble Codes Found:
    ----------------------------------------------
    P0300 Random Misfire Detected.

    what now?

    Let the games begin. This is Jays specialty.
    METHOD 4 MOTOR SPORTS
    415-882-1626

  5. #5

    Default

    ______________________________

    Recaro | Momo | BBS | Bilstein | Brembo

  6. #6
    Join Date
    Jan 2010
    Location
    Evergreen, San Jose (408)
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    238

    Default

    you guys... i dont wanna disable it because it feels wierd (the car)...it feels like something is wrong when it came on...and a couple times after... how do you check if it a real misfire or not? im reading post but all they are is just disabling the sensor which i dont wanna do because of the fact that i think its actually misfiring.
    Last edited by 03Silver; 03-05-2010 at 12:02 PM.

  7. #7

    Default

    This was happening with my car (stock) for awhile at around 30K-40K. I then changed my spark plugs but didn't gap them correctly and it kept occurring. After gaping my plugs correctly it then stopped throwing this code and I haven't seen it since.

    Good luck.

    ~k

  8. #8
    Join Date
    Jan 2010
    Location
    Evergreen, San Jose (408)
    Posts
    238

    Default

    well yeah but im not stock...
    engine mods i got cams, BOV, and Turbo back Exhaust (with stock cat)

  9. #9

    Default

    Quote Originally Posted by 03Silver View Post
    well yeah but im not stock...
    engine mods i got cams, BOV, and Turbo back Exhaust (with stock cat)
    I'm not a mechanic but I've heard that those who run more power lessen their gap to .024 and some down to .020.

    Here is what I found:

    "you must reduce the gap about .004" for every 50 hp you add as a general rule of thumb."

    --

    "i would actually recommend started with a larger gap. try .032 first, then gap down from there if you run into mis-fires.

    You want to run the largest gap possible to properly expose the spark to the mixture. If you run too big, the spark with actually be blown out, causing misfires, if you run too small, the firing end temp increases, thus does the cylinder temps/pressures. Rule of thumb is to start larger and work your way down until you no longer have misfires. Trust me on this. All engines are different, the gap requirements will change from engine to engine, setup to setup.

    Heat range will effect a lot as well, the colder the heat range, the more fouling becomes a problem, make sure your set-up warrants a colder heat range plug. Look at my original post on page one for refference.
    "

    ~k

  10. #10
    Join Date
    Jan 2010
    Location
    Evergreen, San Jose (408)
    Posts
    238

    Default

    haha oh man i have no idea what any of that means...I used this...
    http://evoempire.org/index.php/topic...le-p0300-test/
    and disabled it for now see how the car reacts...

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