ignition coil life

[hogmandon]

I am chasing a no load miss while riding from 2000 to 4000 rpm. If I put slightest load on engine it runs fine. I am tuning with a PC5 with auto tune. Never made it to the dyno but have a feeling it is not the tune. Do the coils go bad and what are some of the simptons or is there some thing else that could cause this. I have put new wires and plugs in and no change. I disconnected the auto tune because I was told by a tuner they go bad. Bike is an 06RG with 128000m on it.
Thanks for any help.

[K4FXD]

Usually a bad coil will show up under load.

Sounds like the cruise area is either too lean or over advanced or both.

[bigfoot5x]

Coils are one of those things that lasts almost forever nowadays. I would not trust a tuner that told you the "auto tune goes bad". He wants work.

[Princess Butt]

I would check the throttle body for gunk buildup. Will affect drivability when transitioning from on and off throttle.

[PC_Hater]

The coil on my bike lasted 17 years or 56,000 miles.
The symptoms on my bike were it ran fine for 6 miles then stopped dead.
Wait for 30 minutes or so and it would fire up and run for another half a mile.

In your case I think I would try other things before replacing the coil.

[rbabos]

I am chasing a no load miss while riding from 2000 to 4000 rpm. If I put slightest load on engine it runs fine. I am tuning with a PC5 with auto tune. Never made it to the dyno but have a feeling it is not the tune. Do the coils go bad and what are some of the simptons or is there some thing else that could cause this. I have put new wires and plugs in and no change. I disconnected the auto tune because I was told by a tuner they go bad. Bike is an 06RG with 128000m on it.
Thanks for any help.

This symptom is usually timing or mixture related. As mentioned load increases the demand on the coils to retain strong spark. It takes more to fire a plug under higher cyl pressures from load, basically so that's where issues show up in ignition. Doubt very much it's coil or plug related if it pulls strong off of light load.
Ron

[hogmandon]

TB is new doesn't matter if I add fuel or lean it out no change that is what is so confusing. I think this started with new SE 50mm TB might be a sensor or injector is bad. I will start swapping back to sensors I know are good and see what happens.
Thanks for the help
Have a great week end to all

[Hossamania]

Check for vacuum leaks?

[PoorUB]

TB is new doesn't matter if I add fuel or lean it out no change that is what is so confusing. I think this started with new SE 50mm TB might be a sensor or injector is bad. I will start swapping back to sensors I know are good and see what happens.
Thanks for the help
Have a great week end to all

Do you have the original TB? might just slap it on and see what happens.

[hogmandon]

What is the best way to check for leaks. what do I spry on them, gas, WD40, water. If that doesn't work maybe I will go back to the 48mm TB and see what happens as suggested above.

[rbabos]

What is the best way to check for leaks. what do I spry on them, gas, WD40, water. If that doesn't work maybe I will go back to the 48mm TB and see what happens as suggested above.

I'm a fan of propane as it reacts really fast and no mess afterwards. Small bottle like a propane torch. Add a small dia hosea  and push in some form of a small hose restrictor to the end.  Check all connections with a slow flow of propane . Avoid pointing the flow stream toward the intake filter. Basically try and do all checks from the right side.  Any hint of a leak the engine will drop down in rpm big time.
I personally don't think it's a leak but needs to be checked off the list. I suspect timing, if you've already tried fuel up and down. For test purposes, drop it -4 in the areas and see if it clears up. You might even need to go with more timing to clear it but not sure of your current timing is . Trial and error to some extent. Can you take a snapshot of your timing tables and post them?
Ron

[hogmandon]

timing tables are all 0 except wide open -4 I will take out timing in those rpm ranges and see what happens. was reading up on MAP sensor and those problems are real close to what I have so will change it out for known good one.