Author Topic: 99 Busa coil codes (Read 22302 times) Tweet

Oz Booster · « **Reply #25 on:** February 22, 2016, 01:49:42 PM »

Jim have you looked at the starter clutch crank index to be sure your timing mark is correct
anything thats timing related is sort of covered when you pull the cam sensor plug , but grasping at straws now

RansomT · « **Reply #26 on:** February 22, 2016, 06:20:22 PM »

I'm real interested in fix for this. It's a head scratcher for sure!

firemanjim · « **Reply #27 on:** March 03, 2016, 02:38:15 PM »

Pulled cover and crank gear is indexed correctly, unplugged cam sensor and no change as well. I am running a Gen 2 intake with stock cam timing, and have heard it is necessary to run offset cam pin--- and have heard you do not need to. How can I check this? Bike makes really good power to just about 8000 then starts to miss and coil codes come up.

RansomT · « **Reply #28 on:** March 03, 2016, 04:32:33 PM »

Quote from: firemanjim on March 03, 2016, 02:38:15 PM

Pulled cover and crank gear is indexed correctly, unplugged cam sensor and no change as well. I am running a Gen 2 intake with stock cam timing, and have heard it is necessary to run offset cam pin--- and have heard you do not need to. How can I check this? Bike makes really good power to just about 8000 then starts to miss and coil codes come up.

Yes, you need an offset cam pin to run a Gen 2 cam in a Gen 1 (same offset cam pin that a Gen 2 uses just put in backward). However, it should have run until redline if you disconnected the cam sensor.

I just had an issue with a 99 that had a repinned 02 harness, it was the crank sensor wiring...they are backwards for 99-00 only.

firemanjim · « **Reply #29 on:** March 03, 2016, 04:42:51 PM »

That was next on checklist-----
Edit that-- just tried it an NOPE!

busa2001 · « **Reply #30 on:** March 03, 2016, 04:45:23 PM »

You need the offset pin to run gen2 cam in gen1...

firemanjim · « **Reply #31 on:** March 03, 2016, 05:17:11 PM »

But by disconnecting the cam sensor I should be bypassing all that----

RansomT · « **Reply #32 on:** March 03, 2016, 06:47:17 PM »

Wonder if the ECU determines timing by the differences between the pulses of the cam and crank sensor? If it does, then upon startup with the intake cam pin in the wrong position, the ECU will set the timing wrong even if you unplug the crank sensor after it starts.

Question: does this bike have an airshifter?

firemanjim · « **Reply #33 on:** March 03, 2016, 09:56:27 PM »

No airshifter. And good question. If all else fails I will pull cam and swap stocker back in. Have Dyna Arc 2 I am going to toss on and see if improved spark helps before that.

Ghost-Geezer · « **Reply #34 on:** March 04, 2016, 12:22:51 AM »

Stator issues at high RPMs causing a shortage of volts/amps to the ignition under load? And/or bad rectifier/regulator as I mentioned earlier. Tough nut to crack.

firemanjim · « **Reply #35 on:** March 07, 2016, 08:47:22 PM »

Greg is sending me a wiring harness for the ARC 2 and I ordered the offset cam pin, pulled cam covcer and yanked the stock pin.

firemanjim · « **Reply #36 on:** March 09, 2016, 02:55:52 PM »

Just installed the offset cam pin and no difference whatsoever, put a volt meter and a battery charger on it and ran again, with no appreciable voltage drop and same.

RansomT · « **Reply #37 on:** March 09, 2016, 04:53:43 PM »

I'm out of suggestions

All I know, if I roll a sportbike on the dyno and it breaks up at high RPM, I automatically check fuel pressure first. Seen lots and lots of bikes have bad fuel pumps. Folks seem to think you can leave MR12 or Q16 or MRX01 in the tank for weeks after a race.

firemanjim · « **Reply #38 on:** March 09, 2016, 09:39:16 PM »

Already did that,it is all good.AFR is good as well.

Ghost-Geezer · « **Reply #39 on:** March 10, 2016, 09:51:23 AM »

Change over the battery to a WPS Lithium Ion and replace the rectifier/regulator next. After that, I am out of ideas as well.

RansomT · « **Reply #40 on:** March 10, 2016, 12:59:37 PM »

Harness issues?

firemanjim · « **Reply #41 on:** March 10, 2016, 03:55:10 PM »

Maybe, but have bypassed coil feed from ecu , going to try putting entire stator,crank sensor from racebike on.

Ghost-Geezer · « **Reply #42 on:** March 10, 2016, 10:02:38 PM »

Stator sounds like a potential source of the issue. Good idea.

firemanjim · « **Reply #43 on:** March 15, 2016, 03:04:02 PM »

So here is the latest, replaced stator/crank sensor package and regulator, stator was a bit corroded, not a bit of difference!!! Even tossed a Power Commander on it and added some fuel up top, not a bit of difference, kinda out of ideas--- anyone got a spare wiring harness for a 99-00 Busa??Or what years will fit?

Wolf · « **Reply #44 on:** March 15, 2016, 05:47:39 PM »

All symptoms point towards a problem with the electrical system but I have to ask; have you done a leak down and compression check to verify the engine is mechanically sound? Some problems can manifest them self in a strange and not logical way.

RansomT · « **Reply #45 on:** March 15, 2016, 06:03:16 PM »

Quote from: firemanjim on March 15, 2016, 03:04:02 PM

So here is the latest, replaced stator/crank sensor package and regulator, stator was a bit corroded, not a bit of difference!!! Even tossed a Power Commander on it and added some fuel up top, not a bit of difference, kinda out of ideas--- anyone got a spare wiring harness for a 99-00 Busa??Or what years will fit?

Here are differences. 99-00 same. 01-07 same. Difference between the 2: Throttle bodies connector. Fuel Pump connector. The rest of the differences are a matter of re-pinning the harness.

I "think" I have a 99-00 harness somewhere ... would have to look for it.

Busa57 · « **Reply #46 on:** March 25, 2016, 03:41:37 PM »

Just had this same problem with customers bike (Busa) ,Went nuts trying to figure it out. Last thing done was to check cam timing and sure enough the intake jumped 1 tooth. Hope you fix the problem - feeling your pain !!

firemanjim · « **Reply #47 on:** March 31, 2016, 10:33:33 PM »

Engine is out as it had a noise, so will be checking all of that. Compression was great, had a couple ex valves a bit tight. Installed a nice clean 06 harness, so fingers crossed.

busa2001 · « **Reply #48 on:** April 01, 2016, 05:07:30 PM »

sounds good keep us posted

firemanjim · « **Reply #49 on:** April 06, 2016, 04:55:01 PM »

Back together, cam timing was correct but checked and intake lobe center was way off at 98( Has Gen 2 cams and gears.Tossed an APE gear on intake and set at 108, now with 2006 Harness it screams to redline with no misses or codes.

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Author Topic: 99 Busa coil codes (Read 22302 times) Tweet