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Old 11-29-2014, 05:31 PM   #1
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04 yamaha r6 running on 3

Changed plugs, tested coil packs, replaced throttle bodies, injectors and injector harness. When I unplug the #4 injector and the bike runs the same only getting fuel to 3 cylinders. Plug it back in still running on 3. Cool replace injector. Same problem. Unplug #4 coil pack. Bike won't run. Ideas please help.
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Old 11-29-2014, 06:02 PM   #2
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You sure the harness is right? Harness plugged in tight?
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Old 12-01-2014, 06:27 AM   #3
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Yes sir. Check it several times
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Old 12-01-2014, 01:55 PM   #4
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Myla's bike already replaced 3 and the 4th is about to go out.
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Old 12-01-2014, 02:18 PM   #5
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Multimeter?
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Old 12-01-2014, 04:35 PM   #6
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Didn't know the harness went bad on these I'll try another set then.


More info on the problem. Fuel pump is putting out over 60psi...... Between 70-75 in 5th and 6th gear bike runs fine as long as I'm not throttling in.
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Old 12-01-2014, 04:36 PM   #7
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R6racer I have a cheap one more or less for checking battery's
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Old 12-01-2014, 04:39 PM   #8
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have you checked or swapped around the ignition coil?
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Old 12-01-2014, 04:55 PM   #9
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Thats what I was thinking. Move a coil from another cylinder and see if the dead cylinder moves
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Old 12-01-2014, 06:32 PM   #10
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I will try that. I know all the coils work
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Old 12-01-2014, 06:48 PM   #11
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Quote:
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I will try that. I know all the coils work
Have you test each of them with the meter?
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Old 12-01-2014, 09:11 PM   #12
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No I haven't
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