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h23 manifold swap/ ecm issue?

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    #1

    h23 manifold swap/ ecm issue?

    Running into a bit of a driveability issue with my 91 lx. Recently swapped in an h23 manifold, I deleted the iab runners and kept the f22a1 pcm that I used when I did a manual swap. It seems at part throttle cruise speeds the car will jerk and buck, almost seems like the iac is cycling for no apparent reason? The car has fresh plugs, wires, cap rotor. No, vacuum leaks, at this point the only thing that makes sense would be a bad iac (cleaned and replaced once) or a pcm for the h23 might be needed. Any other suggestions on where to look/ anybody had an issue like this before?
    Tags: None
    #2
    What ecu are you using? List the whole part number on the sticker of the ecu.

    Also before you swapped the h23 intake did you clean out the EGR ports?
    Last edited by cloudasc; 02-03-2012, 03:56 PM.
    PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

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      #3
      I gave the manifold and the ports a compelete enema of brake clean, and removed all.the carbon and oil that was visible. I deleted the egr and left the valve plugged in. Im thinking about removing the block off and reinstalling the egr. I'll pull the ecm and get a serial as soon I can. Thanks

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        #4
        What would also cause similiar issues to what your having would be an o2 sensor going bad. You can check to see if your drivability issue is caused by the o2 sensor simply by unplugging it. If the drivability problem doesn't occur with the o2 sensor unplugged, you know the culprit; you can find a Denso or NGK/NTK o2 sensor from rockauto.com for under $40 if needed.
        PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

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