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  1. Join Date
    Jan 2008
    Posts
    20
    #1
    Kasi po sa umaga, syempre malamig yung makina, pag-start ko, tataas ng 2k rpm tapos kapag mainit na baba na sya ng 1.5k rpm... Ngayon ang problema taas baba na sya (from 1.5 to 2k rpm)

    Nangyayari lang po ito during cold start. Magnonomorlaize lang sya after a few minutes na umaandar ako. Kapag mainit naman yung makina, wala naman akong problema.

    Help po... Maraming salamat.

  2. Join Date
    Jul 2006
    Posts
    3,601
    #2
    Quote Originally Posted by sukiyakimoto View Post
    Magnonomorlaize
    Again again? nabulol ako dun ah

    Sounds normal to me, ganyan yan to quickly warm up the catalytic converter so it can perform its job. Kailangan mainit ang catalytic converter para efficient ang pagtanggal niya ng noxious emissions sa exhaust. It's just warming it up faster, plus it also warms up the engine faster at cold start so you can readily reach normal operating temp. Syempre pag mainit na, no need to do this so hindi siya nangyayari.

    Baka gusto niyo rin banggitin kung anong modelo ng sasakyan, what year, etc so others can help you out sa susunod. Welcome aboard.

  3. Join Date
    Jan 2008
    Posts
    20
    #3
    ay, heheh... Magnonormalize pla.. hahaha... sori...

    Honda city 2002 (Type Z) ung sasakyan ko.

  4. Join Date
    Jan 2008
    Posts
    20
    #4
    ay, heheh... Magnonormalize pala.. hahaha... sorry...

    Honda city 2002 (Type Z) yung sasakyan ko.

    sori sa double post. paki delete nalang po ung nauna.

    Dagdag ko lang po. Yung taas baba po nya e mabilis.

  5. Join Date
    Jan 2008
    Posts
    4,726
    #5
    cold start RPM at 2,000RPM i think is too HIGH... I have a 323 Mazda DOHC EFI Engine during cold start ang RPM lang eh around 1000 to 1,200 only but when warmed up RPM will go down to normal 800RPM to 900RPM.. masyado pabilis yun 2000 RPM and normal at 1,500RPM?? have your qualified mechanic check and diagnose your RPM readings

  6. Join Date
    Oct 2002
    Posts
    2,716
    #6
    Quote Originally Posted by yapoy86 View Post
    cold start RPM at 2,000RPM i think is too HIGH... I have a 323 Mazda DOHC EFI Engine during cold start ang RPM lang eh around 1000 to 1,200 only but when warmed up RPM will go down to normal 800RPM to 900RPM.. masyado pabilis yun 2000 RPM and normal at 1,500RPM?? have your qualified mechanic check and diagnose your RPM readings
    agree 2000 RPM at cold start is too high. there's definitely something wrong.

    try to have your ISCV yata tawag dun (idle switch control something) checked. Have the throttle body cleaned including the intake manifold.

  7. Join Date
    Jan 2008
    Posts
    20
    #7
    Sir, ok na po yung problem ko. May inadjust lang po sa may bandang throttle body. Hindi po idle switch yung inadjust, ewan ko lang po kung anu yun. Nakalimutan kong itanong e. heheh.

    Maraming salamat po sa mga nagreply. Paclose na lang po ng thread na ito.

  8. Join Date
    Nov 2003
    Posts
    3,849
    #8
    they probably adjusted the idle screw lang.

  9. Join Date
    Jan 2007
    Posts
    84
    #9
    Quote Originally Posted by speedyfix View Post
    they probably adjusted the idle screw lang.


    Yung auto ko, inadjust ko yung idle screw kasi namamatay yung makina, kaso may cycle pa rin na 1,500 to around 500, tapos me chances na namamatay yung makina?

  10. Join Date
    Nov 2003
    Posts
    3,849
    #10
    have the throttle and idle up cleaned. it may help.

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coldstart problem... help...