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  1. #1
    CB750 Addict Dave's Avatar
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    Honda Civic Help anyone.

    While I'm searching the web thought I'd drop a post here.

    I'm working on a 2005 Honda Civic. Cranks, won't start. It has done it a few times recently but usually turning the key off and back on again cured it but now it just won't start. No trouble codes current or pending.

    Battery is good

    I can hear the fuel pump prime but I don't have the tool to check the fuel pressure.

    The Crank sensor is putting out a solid 5v pulse but, I'm not getting any spark at the plug.
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  2. #2
    CB750 Addict pidjones's Avatar
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    Don't know the Civic, but two things come to mind: coil and distributor cap. Caps get corroded, intermitent, and then just fail. I have one to replace on my S-10 4.3l when it warms up some.
    "Love 'em all.... Let GOD sort 'em out!"

  3. #3
    CB750 Addict Dave's Avatar
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    Quote Originally Posted by pidjones View Post
    Don't know the Civic, but two things come to mind: coil and distributor cap. Caps get corroded, intermitent, and then just fail. I have one to replace on my S-10 4.3l when it warms up some.
    Different system. The car has 4 coils and no distributor. It uses sensors and a computer to decide when to spark each plug.
    96% of the time I edit my replies so check back for updates if it isn't at least an hour old

  4. #4
    Moderator dirtdigger's Avatar
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    No spark to all cylinders? Do you have access to a scan tool that displays data? If you do watch the engine rpm while cranking, if you get zero start looking at the crank sensor. Crank sensors are a common issue

  5. #5
    CB750 Addict Dave's Avatar
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    Quote Originally Posted by dirtdigger View Post
    No spark to all cylinders? Do you have access to a scan tool that displays data? If you do watch the engine rpm while cranking, if you get zero start looking at the crank sensor. Crank sensors are a common issue
    Naw, I've never paid to unlock all the extra goodies on the scan tool I bought at a garage sale. It's basically a glorified trouble code reader that can reset ecu's too.

    I checked the crank sensor, good 5v pulse. I checked the TDC sensor, also good 5v pulse. I checked the fuses, all good.

    I finally stared at the dash (sometimes I'm just a dumbass it seems) and finally noticed the green key icon kept flashing instead of going out when I turned the ignition on. I went and got the spare key and it fired right up.

    Have you ever heard of a passive RFID chip failing before? You have now. Damn thing is gonna cost $95 to replace but I got to have a spare key.
    96% of the time I edit my replies so check back for updates if it isn't at least an hour old

  6. #6
    Moderator dirtdigger's Avatar
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    have seen security keys fail fairly often, a lot of gm passlock system fairlures.

  7. #7
    CB750 Addict Dave's Avatar
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    Quote Originally Posted by dirtdigger View Post
    have seen security keys fail fairly often, a lot of gm passlock system fairlures.
    passive ones?
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