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91 CRX hesitation

Discussion in 'Civic and CRX - EF' started by wishbone318, May 7, 2007.

  1. wishbone318

    wishbone318 New Member

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    all,
    I need some help. I recently bought a CRX that has started to have some issues lately. The guy I bought it from did a ZC swap and left a DPI intake manifold on it. The CRX has started to hesitate at low RPM and low throttle position. It seems to clear up once I'm rolling above 50 mph but occasionaly show hesitation here as well. I have swapped out the O2 sensors, check for vacuum leaks, and taken the intake manifold off and inspected it. I can't seem to narrow the issue down. Any recommendations to solve this issue. Thanks
     
  2. 91_Accord_Ex

    91_Accord_Ex 88_CRX_DX

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    I havent done the swap and i have the dpfi but what i believe is that there is probably not enough fuel getting to the motor also what ecu are you runninG?
     
  3. wishbone318

    wishbone318 New Member

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    the ECU for the ZC.
     
  4. 91_Accord_Ex

    91_Accord_Ex 88_CRX_DX

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    Yeah i believe for teh dpfi u need the dpfi ecu. Or there is too much fuel going to the injectors, I am surprised the motor is runing, is it throwing codes? Or can you smell fuel?
     
  5. wishbone318

    wishbone318 New Member

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    i had a code a few months back when it was doing this. it was the O2 sensor. i replaced it and it has been fine until now. i dont smell any fuel either. its interesting to hear you say that it might be running rich. i was leaning towards lean, but i will look into it since hondas are not really what i know. thanks for the input so far
     
  6. 91_Accord_Ex

    91_Accord_Ex 88_CRX_DX

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    Yeah no problem there are some fourms directly for our year cars mabye you should ask around on one of them, you might get better advice/replies
     
  7. Speed Box

    Speed Box New Member

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    It could be a fuel filter or a fuel pump. Just change the filter and check the fuel pressure or check it then change it. Use a fuel pressure guage, it should be around 40 psi. I had a similar problem on 88 crx once with stock Si motor thou.
     
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