07 zx6r crank no start no spark - ZX6R Forum
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post #1 of 20 Old 06-15-2017, 05:55 AM Thread Starter
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Unhappy 07 zx6r crank no start no spark

hey everyone im new to bikes but im a tech in a shop so I'm good with mechanical and electric things.
here's the issue. last week i rode my 07 zx6r to work, on the way there it started to sputter and buck at about 80 mph in every gear. I made it to work and decided to do a little maintenance to see if i could get it to stop sputtering. before i touched anything i noticed the bike would crank just fine but it would not turn over. at the time the fuel pump was still priming. I pulled the spark plugs and they looked toasted so i replaced them. still crank no start. charged the battery to make sure it was good. still crank no start. when i bought the bike it came with a bunch of spare parts so i started swapping things out and buying parts. here is the current list of things that have been switched out.
ecu
stator
regulator rectifier
left hand switch (headlight lap ect)
Kill switch
spark plugs
relay box (tested good per service manual) all relays clicking like they should)
fuel pump (tested good spits fuel whenever jumpered to the battery)
kickstand switch
tip over sensor
(stick coils ohm out correctly per the service manual and im getting voltage to them)
after all that the fuel pump is not getting power with the key on and neither are the fuel injectors.
also i cleaned all the grounds and there are no codes.
anyone have any ideas as to what this could be im really at my wits end with this issue.
any and all help is greatly appreciated
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post #2 of 20 Old 06-15-2017, 10:51 AM Thread Starter
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did i post this in the wrong section
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post #3 of 20 Old 06-15-2017, 11:04 AM
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I think you've got guys spinning their heads right now.... No way would I change all that stuff at once. And then... when I did swap stuff out... if it didn't fix the issue I'd put the original back on if I wasn't 100% sure the replacement was good..

You may have created more problems than you original had to start.





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post #4 of 20 Old 06-15-2017, 11:28 AM Thread Starter
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believe it or not all the parts on the bike now are tested good per the service manual, and i did do it one by one like the stick coils both the old and the new ohm out correctly for the primary and secondary windings, the ecu i got was a little suspect cause it started showing code 39 so i plugged the original ecu back in with no issue. neither ecu gets the pump to prime and its literally a brand new pump with a brand new screen. even the relay box tests out like it should. the only thing left to change out is the wiring harness itself but it doesnt seem bad like i have continuity between all the connections i tested.
im gonna do a compression test today and hope for some kind of reasoning behind this crazyness
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post #5 of 20 Old 06-15-2017, 12:11 PM
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Quote:
Originally Posted by Taka21 View Post
believe it or not all the parts on the bike now are tested good per the service manual, and i did do it one by one like the stick coils both the old and the new ohm out correctly for the primary and secondary windings, the ecu i got was a little suspect cause it started showing code 39 so i plugged the original ecu back in with no issue. neither ecu gets the pump to prime and its literally a brand new pump with a brand new screen. even the relay box tests out like it should. the only thing left to change out is the wiring harness itself but it doesnt seem bad like i have continuity between all the connections i tested.
im gonna do a compression test today and hope for some kind of reasoning behind this crazyness
Any time you purchase a bike with a bunch of spare parts...... you have to wonder why the previous owner felt the need to collect them.......

I'd do that compression check to make sure you can actually get the motor to run, presuming all the electronics are doing their part. hopefully, it's really in the electronics somewhere -- but like you know you need to be assured of that.

if the plugs are clean and dry.... it's probably fuel.

If the plugs are wet and oily, it's probably electrical.

As your symptoms seem to have gotten progressively worse, I'd think that there are connectors which aren't seated properly compounding your issues. go through all of them one by one and ensure they are clean with bright shiny contacts, no pinches etc.
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"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #6 of 20 Old 06-18-2017, 06:56 AM Thread Starter
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ok so quick update compression is good at roughly 190psi across the board. im definetly not getting fuel.
fuel pump works but its not getting the signal from the ecu.
i noticed the voltage drops in the connector on the positive lead for the fuel pump on the harness side after a few seconds of the key in the on position. (is that normal)
I cleaned every single ground and contact in the entire harness and even though it seems to have helped it didnt help enough to start it lol.
im thinking its the ecu itself i found that the one i got off ebay was bad. it kicked code 39 as soon as you turn the bike on. my original ecu doesnt.
one thing i noticed though is that the ecu i bought had holes in the underside like somebody mounted their tag to it without knowing it was under the tail. i also almost put a screw through my original one before i knew it was under there too so i see how the mistake can be made. im pretty sure that is what caused all this. ill be sourcing a known good ecu and see if that makes it work
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post #7 of 20 Old 06-18-2017, 09:06 AM
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Is there a broken wire off the bottom of the ignition switch?

and you checked the connectors as well?--mostly off the ignition switch and the kill switch

Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
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post #8 of 20 Old 06-18-2017, 09:21 AM
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Are you getting spark?
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post #9 of 20 Old 06-18-2017, 10:22 AM
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Will it run if you shoot ether into the intake?
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"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #10 of 20 Old 06-18-2017, 12:23 PM
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Will it run if you shoot ether into the intake?
Would answer the spark question.

Reason I asked that would say if the ECU was happy with all the sensors etc.
That would leave just the fuel system, relay etc.
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post #11 of 20 Old 06-18-2017, 01:15 PM
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^^Occam's Razor should always be applied.
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"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #12 of 20 Old 06-18-2017, 03:58 PM
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^^Occam's Razor should always be applied.
Thought about it, using it how would you proceed.
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post #13 of 20 Old 06-18-2017, 05:09 PM
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First cut is deciding which part of the fire triangle is missing. As we have just discussed, if another flammable mix will ignite, then we are reasonably certain it's not spark related.
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"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #14 of 20 Old 06-18-2017, 05:31 PM
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The other portion of that saying that is so critical to problem solving is always working from the simplest solution towards the more complicated ones.

That, and remembering that your first thought is typically correct. Remaining open to the possibility that you aren't right on the first crack, and having the integrity to pursue the facts wherever they may lead..... that's the most important part. But finding a way to ask a question that the answer tells you something about the root cause of the problem; that's where the troubleshooting trees come from. Trial and error recorded, and ordered for most efficient process. Least number of steps to the solution.
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"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #15 of 20 Old 06-18-2017, 05:46 PM
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Test harness the fuel pump 12v to kick on. Start bike if pump kicks on then voltage drop test original harness.
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