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    Running Rich

    I did the DOHC swap now my engine is running very rich anyone got ideas?

    #2
    O2 sensor, or more likely, you either have a bad coolant sensor, or you didn't connect up all three: One turns on the fan, one reports to the gauge, and one tells the computer if the car is cold. It's that last one that will make the car rich (it forces the car to run in cold-mode all the time). That sensor is on the back of the head near the distributor (actually, I think all three are on the back of the head somewhere). Don't currently have my service manual with me, so I can't tell you which one, although in mine I think the connector is green.
    David Avard
    '90 Protege LX (STS-prepped)
    '89 Civic Si (STS-prepped)
    '02 Altima SE (14.164 @ 97.7mph stock)

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