3 cylinder miss fire

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Old Oct 10, 2016 | 03:20 PM
  #1  
Joe Yaerrd's Avatar
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Default 3 cylinder miss fire

91 civic hatch ls swapped monotec harness I get spark And fuel..only number 3 misses new dizzy 0bd1 dizzy and injectors resistor deleted .. I'm stumped changed plugs wires and that injector
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Old Oct 10, 2016 | 05:02 PM
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Default Re: 3 cylinder miss fire

What is the spark like on #3 cylinder, use HEI spark tester to check spark, should be bright blue.94
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Old Oct 11, 2016 | 05:47 AM
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Default Re: 3 cylinder miss fire

I used the old school method the good old screwdriver in the boot ..it seems OK ...I ran it 0bd0 with a 0bd0 dizzy same thing...then I switched to 0bd1 same issue. ..there's a video on YouTube of the first time I started it...b18a1 ef first start the title is I believe
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Old Oct 11, 2016 | 06:17 AM
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Default Re: 3 cylinder miss fire

I'm to the point that I think it's a burnt valve but no compression tester till Saturday
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Old Oct 11, 2016 | 07:21 AM
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Default Re: 3 cylinder miss fire

You sure it's not a clog or stuck injector? Just because there is "fuel" doesn't mean it's enough or not too much. Just one more thing to check in the meantime, if you're waiting on a compression tester.
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Old Oct 11, 2016 | 08:25 AM
  #6  
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Default Re: 3 cylinder miss fire

I've changed the injector already. ..it gets spark it could be weak but I've changed the full dizzy cap and rotor so I can't see how it can be weak now even if it was ...ugh man this sucks
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Old Oct 11, 2016 | 02:16 PM
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Default Re: 3 cylinder miss fire

A screwdriver is not the correct way to test the spark, you need an HEI spark tester, $10 or less at any auto parts store.
Also, even if you swapped out the whole distributor with a brand new one it would not help if the problem is the spark plug lead, you need to at least test them. 94
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