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Engine Hesitates During Acceleration.

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    Engine Hesitates During Acceleration.

    ok, so my car was doin this and i posted a thread and nobody answered, and there was some one with the same problem. i found out wat it is...

    If your customer complains that the engine
    hesitates briefly when accelerating, chances are
    the ECM/PCM is ordering fuel cutoff because of
    low or delayed engine oil pressure to the VTEC
    system. Typical causes for low or delayed oil
    pressure are low oil level, a dented oil pan that’s
    touching the oil pickup screen, or some other oil
    flow restriction.
    When the throttle opening, vehicle speed, engine
    coolant temperature, and engine speed indicate
    that VTEC is needed, the ECM/PCM turns on the
    VTEC solenoid valve.
    Oil pressure should immediately turn off the
    VTEC oil pressure switch. But if the switch stays
    on (because of low oil pressure), the ECM/PCM
    orders fuel cutoff and shuts off all the fuel
    injectors. Normally the ECM/PCM turns on the
    MIL and sets DTC P1259 (VTEC system
    malfunction). But if the oil pressure switch turns
    off before the ECM/PCM sets the DTC, the engine
    hesitates and then runs normally.
    To fix this engine hesitation, troubleshoot the oil
    level or oil supply problem.

    source: ima a honda student

    H22 cb7:
    http://www.cb7tuner.com/vbb/showthread.php?t=133482
    cb9:
    http://www.cb7tuner.com/vbb/showthread.php?t=187076
    dd cb7:
    http://www.cb7tuner.com/vbb/showthread.php?t=203058

    #2
    Obviously this doesn't relate to a stock CB7, I'm assuming H22, or F22/3 vtec.
    Could you please add the info for model / year / and engine this relates to.


    Car Safety / General Servicing Checks --------Basic suspension checks

    My 5.7 LS1 Holden Ute

    A "Finished" project car is never finished until its been sold.

    If at first you don't succeed, Try again. Don't give up too easily, persistance pays off in the end.

    Comment


      #3
      Originally posted by evil_demon_01 View Post
      Obviously this doesn't relate to a stock CB7, I'm assuming H22, or F22/3 vtec.
      Could you please add the info for model / year / and engine this relates to.
      my bad yea its a h22

      H22 cb7:
      http://www.cb7tuner.com/vbb/showthread.php?t=133482
      cb9:
      http://www.cb7tuner.com/vbb/showthread.php?t=187076
      dd cb7:
      http://www.cb7tuner.com/vbb/showthread.php?t=203058

      Comment


        #4
        It could easily be the IACV. That's been a recurring problem among CB's. And pretty much any other early 90's car with an EGR system.

        Comment


          #5
          Or spark plugs...

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