Ok – ready? Here’s the latest….
(quick re-cap – front cylinder valves were out, and yes, some deposits causing seat issues – that is fixed, and front compression is fine…still lingering coil faults, and rough running…)
Last night, I used the Technoresearch tool/software to inspect the bike myself.
Sure enough, the coil faults throw up – but more detail than the DDS – it says “Charge below threshold” on each coil, and it also says “Open Circuit”.
So, before I do anything else, I then check out the Fuel Trim setting.
(a couple of guys mentioned that the symptoms sounded like it was running lean, and that this can sometime throw coil faults – but I’m not sure how..
)
It is at ZERO,understandably. So I tweak it – up to and beyond 30 – until the bike starts to stumble – then back to 15 and set it there – seems like a happy idle.
(I tried it in negative “lean” – and the idle was up and down like a yo-yo)
Bike is cold, by the way – 40-50 degrees.
Then I Clear the faults, reset the TPS, start it again, check the trim – still at 15, so that’s good, I recheck for faults, and nothing comes up. I have a scotch, watch a couple of episodes of “Californication”, make a booty call and go to bed.
This morning I go for a ride. Bike starts well, holds a nice idle, and the second I pull away, I can feel the difference – it is AMAZINGLY SMOOTH, holds an easy throttle in first while cold – 2,500- 3,500 RPM, warms up flawlessly (no funky idling) – is super mild and smooth on small throttle openings, is a joy to ride in traffic, and pulls really well and smooth.
I can get on the throttle earlier when exiting corners and be more aggressive in general without the jerky, snatchy response.
I can on and off the throttle in first without the need to feather the clutch like before.
Oh, and the bike also sounds different. A lower, deeper smoother thrumming sound – zero popping – the occasional burble, but no strong pops – it’s just smooth up and down through the rev range and on hard over runs, downshifts it’s fine. WOW.
So, I come back home – bike’s hot – 110 degrees, I let it cool and I test again.
Faults come up again. I clear them, they come up again, and again, and again.
So it seems the faults only appear when the bike is Warmed up….I will test this theory again tomorrow when the bike is cold.
I adjust the trim slightly up to 17 (re-set TPS), and it seems slightly more stable, although no real issues at 15 – I will test it at 17 again tomorrow.
Now, something else to mention… I also tested the function of the circuits for the coils, injectors etc – I could hear a hissing or clicking sound when I checked all of these.
When I checked the stepper motor, there was no noise. I wonder if there should be, and if this could be at all related to the coil fault issue? I’m using the DP ECU – does this still operate the stepper motor?
In summary, I guess the key point is…
…if bike seems to be running well, should I continue to hunt the devilish coil faults – or are they just “one of those random things”?
If I could get an exhaust sniffer and carbtune, I could finish the set up properly to a tee, and then live with the coil fault nemesis...just like Nicholson in the movie “Pledge” where he continues to hunt to serial killer, even though unbeknownst to him, the killer met with an untimely end himself.
Thoughts..?
