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my car misfire on 3 and 4 cylinder?

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Old 06-07-2007, 06:14 AM
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evolutionviii5m
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Default my car misfire on 3 and 4 cylinder?

hey my car mysfire on the cylinder 3 and 4 and I don't know what else to do I have changed everything the dist,dist cap, dist, rotor, and still I need help thank's
Old 06-07-2007, 11:13 AM
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94civicEX
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Plugs?
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Old 06-07-2007, 04:54 PM
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evolutionviii5m
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Default my car misfire on 3 and 4 cylinder?

no I have changed plugs,dist,dist rotor,dist cap and this start happening since I swap the head on my engine I used to have a d16Y5 and now I have the D16Y8 head so any tips thank's!
Old 06-07-2007, 07:34 PM
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Fuse
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Check compression/ trace all your work back/
Old 06-07-2007, 07:40 PM
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how can I check my compression?
Old 06-07-2007, 07:41 PM
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Are you messing with me you just changed a head?
Old 06-07-2007, 07:44 PM
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evolutionviii5m
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well my car runs strong on all gears just misfire on 3and 4 when is at low rpms before the 3500 RPM's and it doesnt do it too often but it does! and I always get my OBD code PO303&304 so I don't know where else to check! do u gusy think I have to change the ECU as well?
Old 06-07-2007, 07:46 PM
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evolutionviii5m
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I have the block with the pistons and everything out of the D16Y8 is sitting on my garage I didn't want to put all the engine tho! should I have?
Old 06-07-2007, 07:48 PM
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Hold on let me get some stuff.
Old 06-07-2007, 07:50 PM
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I din't wanted to change the whole engine since I don't have much help but I would if I have to to make it work



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