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EF hatch/LS swap supposed to be easy right?

Discussion in 'Civic and CRX - EF' started by civicrunner90, Nov 23, 2013.

  1. civicrunner90

    civicrunner90 New Member

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    ive had my EF hatch/LS swap for a while now n never been able to get it right(was an LSV swap but that didnt pan out),it either runs like shit or has codes or what ever else the car decides to do.well today me n 2 friends checked some stuff out and found something.
    when we measured the voltage/ohms at each injector plug with the key on and cyl 1 was at 12.xx v/over limit ohms while the other 3 cylanders were at .81v/similar ohms on all three...i currently have/had codes 6,9,10,16 (9 and 16 being intermittent) and i was curious if the excessive voltage to cyl 1 injector cause these and if replaceing my resistor box would help.?
     
  2. civicrunner90

    civicrunner90 New Member

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    ok 45 views n no one thinks "hey ik this,ill help this guy out"? come on people
     
  3. Fernpatch

    Fernpatch Member

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    Unplug the resister box and look at the wires on the plug for the resister box. there should be 5 wires, 4 are the same color and one is different. Measure the resistance from the one odd color wire to each of the other wires. The ohm value should be the same on all 4 legs.
     
  4. civicrunner90

    civicrunner90 New Member

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    ok ill try that tmrw thank you.
     
  5. Dual-500

    Dual-500 Well-Known Member VIP

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    Something is wrong. The injectors all get 12v, either from the resistor box or direct from ignition system. One side of the injector gets 12v all the time, while the other side goes to the ECU and they sequentially get dropped to ground to make current flow throught he coil and spray fuel. On a 4 cylinder engine, only one injector will "fire" at a time.

    Reading the source side of the injectors, they should all read 12v all the time. The ECU side will yield 12v on all also as they don't "fire" without a strobe signal from the distributor when the engine is turning over. In which case the injectors are "firing" and the low signal is moving from one injector to the next faster than you can read the voltage changes with a meter. It takes a scope for that.

    Better find a wiring schematic.
     
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