| Author | Message | ||
     Redbat |
I removed my Racing ECM, for an "update", and installed my original ECM. The AFV's always stayed at 100 front and rear. Now the front is 128.5, and the rear is 100. It also threw a code of P1047. Can some one with a diagnostic manual tell me what the code means? Thanks. | ||
| Hd8803rider |
code P1047 is Feedback Fuel Cylinder Difference too Great is what it says here in my Buell Electrical Diagnostic Manual | ||
| Cataract2 |
Believe that code is for the AFVs being way outta wack. What else do you have done to the bike? Doesn't surprise me that the stock ECM did that if you've modified it a bit. | ||
| Froggy |
If the difference in AFV is too great between both cylinders (20% I think is the limit), it will throw that code. What exhaust are you running? | ||
| Redbat |
Cataract2, I'll give you the whole picture so to speak. I'm running a D&D slipon, ran it with the stock ECM. AFV's 100 front & rear. Then added the E-B-R racing ECM (pump gas version) AFV's stayed at 100. Then, installed a Twin Tec engine control module, and adjusted it to give me more low and mid-range torq.It really worked well with the racing module. Ran this configuration for five months now. For reasons listed earlier, I removed the racing ECM, reinstalled the stock ECM, did the tps reset, and rode the bike aprox. 7 miles. This is when the code popped up, and the front AFV went to 128.5. Stopped, shut off ignition, and reset all values back to zero on the Twin Tec module. Rode some more, AFV's still 128.5 front, 100 rear. Is it possible, that if my battery is a little low on charge, that it may have something to do with this scenario? It seems like it may be slightly under charged at 11.9 volts.(with the ignition off) Riding, it was at 13.4 to 13.9 volts. | ||
| Froggy |
I'd place my money on that twin tec, aftermarket bolt on boxes are known to go and screw up the AFV. I would remove it and try again. | ||
| D_adams |
I'd remove the twintec unit ( disable it ) and then ride at 4000 rpm in 3rd gear for 2+ miles to force the ECM to go into learn mode. Once it's in the learn mode; it will auto adjust the afv's and probably close the spread. Also, I'm pretty sure the spread is 25% to generate a code. | ||
| Cravacor |
11.9 is a dead battery. A dead battery has like 90% of the voltage of a live one (or something like that). That aftermarket box can't be helping, I would guess. | ||
| Dirty_john |
Erik Buell Racing have advised me in the past that the AFV will always reset to 100/100 when the ignition is turned on, this would explain why you have been seeing no error code with the Erik Buell Racing ECM. OEM ECM will throw an error code if the differnece in the two cylinders AFV is greater than 20 (Message edited by Dirty_john on June 09, 2010) | ||
| Redbat |
Dirty_john, no I didn't see an error code with the race ECM, but the AFV's were always at 100 for both cylinders. I checked every time I rode my bike. | ||
| Dirty_john |
Redbat - that would be using the Erik Buell Racing ECM, thats my point, suggest you e:mail Michael at Erik Buell Racing. |
