Running on two cylinders? - Page 2 - Yamaha R6 Forum: YZF-R6 Forums
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post #11 of 41 (permalink) Old 03-10-2019, 03:28 PM
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Re: Running on two cylinders?

they would still heat up the exhaust pipe. you're not getting fuel to those 2 cyl if you confirmed you do get spark.
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post #12 of 41 (permalink) Old 03-10-2019, 03:29 PM
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Re: Running on two cylinders?

Quote:
Originally Posted by NotNattyR6 View Post
Would it be possible that the hissing sound from testing the coils in diag mode could have cause the ecu to fry? I do remember a weird smell afterwards..
it should not have fried the ecu but that doesn't mean it didn't happen. or the coils went bad. if you have ever smelled electrical parts burn you wont ever forget it.
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post #13 of 41 (permalink) Old 03-10-2019, 03:32 PM Thread Starter
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Re: Running on two cylinders?

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Originally Posted by yamahacrazy View Post
they would still heat up the exhaust pipe. you're not getting fuel to those 2 cyl if you confirmed you do get spark.
I moved around the fuel injectors along with the coils from the running cylinder, without any luck.. Looking like a fried ecu, if the compression test passes..
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post #14 of 41 (permalink) Old 03-11-2019, 04:36 PM Thread Starter
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Compression test all came back 180-185 psi, on the low end but no huge variation

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post #15 of 41 (permalink) Old 03-11-2019, 07:00 PM
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Re: Running on two cylinders?

Bright side is, better that it passes the compression test.

If the ECU truly is bad, "voltage drop test" your grounding between engine/battery/regulator/frame.
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post #16 of 41 (permalink) Old 03-21-2019, 05:40 PM Thread Starter
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Re: Running on two cylinders?

Swapped my ecu with my friends 07 R6, same issue. Cylinder 2 still not firing
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post #17 of 41 (permalink) Old 03-21-2019, 05:53 PM
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Re: Running on two cylinders?

Two cylinders not firing, or cylinder two not firing? Was there any change at all since the ECU swap or truly the "same issue" ?
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post #18 of 41 (permalink) Old 03-21-2019, 05:58 PM Thread Starter
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Re: Running on two cylinders?

No change whatsoever, exactly the same issue as before the ecu swap. Gonna dive into it again tomorrow..
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post #19 of 41 (permalink) Old 03-21-2019, 05:58 PM
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You said you moved the injectors around, but are they actually firing? Did you check voltage at the connectors on them or pull them all out and see fuel spray out of them all? You have compression, air and fire.... The only thing left is fuel.
An easier way to see if you have fuel to all the cylinders is to lightly spray starting fluid in the intake. If those dead cylinders start producing heat then you know it is fuel. BTW, I would use a IR temp gun to check temps as that would be a better judge of an increase in temp.

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post #20 of 41 (permalink) Old 03-21-2019, 06:02 PM Thread Starter
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Re: Running on two cylinders?

Quote:
Originally Posted by The Evil Twin View Post
You said you moved the injectors around, but are they actually firing? Did you check voltage at the connectors on them or pull them all out and see fuel spray out of them all? You have compression, air and fire.... The only thing left is fuel.
An easier way to see if you have fuel to all the cylinders is to lightly spray starting fluid in the intake. If those dead cylinders start producing heat then you know it is fuel. BTW, I would use a IR temp gun to check temps as that would be a better judge of an increase in temp.
I checked the voltage on the injector connectors, it was running 12.6-12.8v and I checked the resistance of the injector 2, it was 12.5-12.6. Swapped injector 1 with 2 and nothing changed.
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