| Author |
Message |
    
David_e
| | Posted on Friday, November 21, 2008 - 12:55 pm: | 
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Can I make the section of the ecm that controls cruising rpm range richer. I have surging issues at cruising speed that I have not been able to fix. |
Jlnance
| | Posted on Friday, November 21, 2008 - 02:09 pm: |
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are they right at 55 mph in 5th gear? |
Bombardier
| | Posted on Friday, November 21, 2008 - 04:59 pm: |
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The only limit for fuel enrichment is the injectors and that will only happen at max revs with forced induction.
I am led to believe that even with a Monster Big Bore kit from Revperf the only limiting factor is the throttle body.
Surging in this area can sometimes be fixed by a tps reset and adjusting the primary chain.
If you have ecmspy and megalogger it will give you a very good insight into what the ecm of the bike is seeing from all the sensors.
The engine temp sensor can sometimes affect the rideability also. It controls both fuel enrichment as well as ignition advance and is often the culprit despite not throwing a code. It will continue to send info even if it is out of spec(shifted).
Start with the easy stuff first and if that does not work move onto replacing items. |
David_e
| | Posted on Friday, November 21, 2008 - 06:39 pm: |
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I reset the TPS and re-timed it but it's still doing it. It surges at about 2500 rpm while maintaining speed. |
Bombardier
| | Posted on Friday, November 21, 2008 - 11:52 pm: |
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Have you checked the primary? |
Garyz28
| | Posted on Saturday, November 22, 2008 - 12:07 am: |
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I bumped all the cells below 3000 rpm's and between 10% and 31% throttle up by 2%. It seems to have made my bike run much smoother in that range. |
Bombardier
| | Posted on Saturday, November 22, 2008 - 05:49 am: |
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How did you come up with the percentage to bump up the cells?
Megalogger? A/F ratio? |
Garyz28
| | Posted on Saturday, November 22, 2008 - 03:48 pm: |
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2% was really just an arbitrary number I thought I would try.
First highlight all the cells you want to change,then below the table in the window just to the right of the *button change 1.0 to 1.02, then press the * button. Repeat for the other cylinder. |
Kalali
| | Posted on Monday, November 24, 2008 - 11:56 am: |
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How about intake seals? I remember reading about a similar situation and the intake seals were the culprit... |
David_e
| | Posted on Monday, November 24, 2008 - 03:26 pm: |
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I checked them with starting fluid as well as WD-40 sprayed in the intake seal area with no RPM change. |
Xoptimizedrsx
| | Posted on Monday, November 24, 2008 - 07:13 pm: |
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use the ego target cells to adjust the afv to the target afr you desire.
its not hard to move the settings on where the o2 sensor scales the afr zone then corrects the afv to run that afr table.
who a mouth full there!
just set the mid o2/ego scale to .55 rich at .65 lean at .45
then the ecm will scale itself. this will give a slight more fuel from the table learn values. setting it just where it need to be to smooth out.
note if you move the fuel values make sure the scale is even not just added in a single row. you need to gauge all areas in a zone not a single rpm row
a dyno will help but not necessary to get the bike smooth and better than factory.
believe me a dyno tune can win dyno shootout but on the road they are not so hot a 1/3 the time.
shoot for reliability and road time not just big dyno numbers.
the bike will run better last longer and make you smile more. with less maintenance
mike |
David_e
| | Posted on Tuesday, November 25, 2008 - 12:31 pm: |
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Thanks mike. I don't care about dyno numbers I just want it to run good.
Thanks again. I'll try this. |
Kalali
| | Posted on Wednesday, November 26, 2008 - 01:08 pm: |
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Mike, what do you mean by "use the EGO target cells" ?
My EGO% seems to track my AFV all the time.
Also, does your suggestion for O2 voltage changes apply to an X1 and will the change help without changing anything else in the fuel maps?
And just to be sure, you say change:
0.49--> 0.45
0.50--> 0.55
0.51--> 0.65
Right? |
Jonnylighting
| | Posted on Wednesday, November 26, 2008 - 06:19 pm: |
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Not a Harley! I run my at 3000rpm, with no surging and still get about 55mpg. |
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Richen up low end rpm with ECMSpy?