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Engine Problems

Discussion in 'HYBRID -> EG-EK / DC' started by civic_SI_hatch, Feb 5, 2003.

  1. i'm swaping a 99 civic si ... i'm using my old harness and ecu of the 92 si hatch ... it cranks but revs up and down a little... what could be the problem? also the check engine light comes on? is it suppose to?
     
  2. slammedb18acivic

    slammedb18acivic Senior Member

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    revs up and down like . goes up to 3 grand and back down to 1000 rpms. if so you have a vaccum leak or a bad coolant sensor. if you changed any gaskets when you did the swap such as the intake manifold go back and loosen it up and tighten them evenly . bad sensors can be, throttle position sensor ,idle air control, or fast idle valve .
     
  3. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    what ECU are you using?
     
  4. i'm using the stock ecu from the 92 civic si hatch... i think its a p28.. but i'm not sure
     
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