Apex not running right

[onlymyyamahas]

The moisture is always turned to ice and thawed it never looks or smells like antifreeze...
I'm trying to upload a picture of the plugs but keep getting error..
Also wouldn't I notice a low compression on said cylinder with a compression test?
I did have 150# in all 4 cylinders at last check but I'll try another test .

 

[03RX1-ER-LE]

The moisture is always turned to ice and thawed it never looks or smells like antifreeze...
I'm trying to upload a picture of the plugs but keep getting error..
Also wouldn't I notice a low compression on said cylinder with a compression test?
I did have 150# in all 4 cylinders at last check but I'll try another test .

Do you have a cylinder leak tester? Compression is good however if you have a leak tester run that test, watch for bubbles in coolant reservoir.

 

[thor452]

Well I'm still at a lost, did a 15-mile ride and it's still running the same way so I just turned around and came back to shop.. still starts no problem idols and runs but just boggy and don't feel right..nothing out of the ordinary on the ride no backfire ,coughing nothing. Did a total tear down. Exhaust headers and pipes look okay nothing obvious. Did a plug check and number 2 plug look brand new like maybe it hadnt been running but it was not wet or anyting 1, 3 and 4 all looked alike..pulled all 4 injectors and did a test and cleaning , all had a good spray pattern.I also did a spark test the way nitro explained in a previous post and all 4 plugs had spark. I really hate to put it back together without finding something obvious..the only other obvious thing was after the ride I had moisture in my air cleaner again right at the end of the crankcase vent tube

There is your problem but why is it not firing is the question. that cylinder is not firing if it was it would look like the rest. try switching the plug and the coil to a different cylinder run it for a mile and see if it starts to change color if not change the coil out.

 

[onlymyyamahas]

 

[onlymyyamahas]

I did a spark test with the diagnostics and it sparked same as 1,3 and 4
This is a brand new set of plugs with 30 miles on them..

 

[thor452]

sparking in open air in easy sparking under 150 psi is hard I am thinking you have a coil that is weak if you move the coil and the plug to a different hole and that plug still looks the same then you will know. you could also grab a junk spark plug and straighten the electrode and see if it can jump the gap with a spark test if it can then coil is good but spark is shorting before it gets to the plug when in the hole. bottom line that plug is not firing when in the motor either weak coil or a short in the plug boot.

 

[onlymyyamahas]

I believe I may have finally found the problem after all this...#2 injector is not getting power and it's between the injector plug in and the harness plug mounted on the frame above the clutch..

 

[maim]

sounds like you got it.

 

[onlymyyamahas]

Hopefully, the wire to #2 injector was broke from rubbing on frame about 4 inches down from the harness plug.It won't let me download a picture in case someone else ever has the same problem..
I couldn't see it until I totally removed the harness..

 

[thor452]

sparking in open air in easy sparking under 150 psi is hard I am thinking you have a coil that is weak if you move the coil and the plug to a different hole and that plug still looks the same then you will know. you could also grab a junk spark plug and straighten the electrode and see if it can jump the gap with a spark test if it can then coil is good but spark is shorting before it gets to the plug when in the hole. bottom line that plug is not firing when in the motor either weak coil or a short in the plug boot.

Or you have no power to the injector lol

 

[onlymyyamahas]

 

[onlymyyamahas]

That green wire was the culprit giving me many headaches..

 

[thor452]

Glad you found it!!

 

[onlymyyamahas]

Did over 100 miles today and it ran flawless, I love my Apex..
Thank you everyone for help , I've learned a lot and everyone on here so helpful.. TY is awesome..