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idle issues after engine replacement

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    #1

    idle issues after engine replacement

    hey i just did am engine swap. (same engine different car)stock f22a. got it all put back together and when i started it the idle went hay wire up to like 4000 rpm then down to 1000. pretty serious flux.and kinda sounds like its missing it's throwing codes how do i go about checking them. and any other suggestions would be appreciated. thanks ,00rx7
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    #2
    See the thread at the top of this section that says "read this first"?

    Read that. In there, you'll find the information you need to set your base idle, base ignition, and read the CEL codes.






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      #3
      it's throwing code 41 primary o2 sensor heater. what exactly does that mean? new o2 sensor?

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        #4
        Yes. Get NTK/NGK or Denso only. Don't get a Bosch sensor. They don't work properly. Rockauto.com has Denso for a very reasonable price. Be sure you get the proper one for your car (DX/LX and EX/SE sensors have different mounting locations.)






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          #5
          i have a header so would i be better off getting a universal one or cutting and splicing the plug on a car specific one. also it seems to me that an o2 sensor issue is not my only issue, im not positive would the o2 sensor cause massive idle flux and or sounding like it is missing. i was having a hard time telling because the sound was so (irraticly?) going from almost 4000 to 1000 rpm

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            #6
            No, the o2 sensor would not cause that idle issue, which is why I directed you to the thread that tells you how to fix that.

            You should never cut and splice your o2 sensor wires, as it can alter the resistance and corrupt the signal. Your header should either have 2 o2 bungs on it (like most of the cheapies you can find), or it should be car-specific. The o2 bung should be in the same place as the stock location.






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