Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[SEFast]

Had my 110 Dyno'd at the dealer last winter and now am getting a lot of pre-ignition pinging when I throttle up to pass or climb a hill. 

Spark plugs indicate that the engine is running lean (plugs are white). 

Started having a bunch of engine fault codes and the dealer replaced a bad ECM.  I asked about a new dyno and they said that they had transferred the old dyno program to the new ECM and the bike would not need to be redone.  I personally don't think that was good as the ECM could have had faults during the last dyno.

Thought on the pre-ignition pinging???


Thanks in advance for any help!!

[hawgzilla]

What tuner was used to dyno tune the bike?  Did the dealer have the tuner interface?  Was the bike good (no pinging) up until the ECM was replaced? 
I would be concerned with how the dealer “transferred “ the old program.

[Unbalanced]

The bike would need to be retuned to a tuner and checked for lean, but I’d lean towards timing and load.

Was the bike tuned in a different area of the country compared to where you live?   

The tuner can put a load on the bike e.g. (Dyno brake) and should be able to check where the knock sensor is going off and adjust the timing tables to fix the issue.

[grc]

Check the obvious items like intake air leaks to eliminate things other than the tune, then find a better tuner.  Most Harley dealers don't seem to have great or even good tuners on staff; yours may be different but if you've been having these issues since immediately after they tuned your bike I'd say you got a lousy tune.  They can detect detonation problems on the dyno, they don't even have to do a road test, so giving the bike back to you in that condition tells me pretty much all I need to know about them.

JMHO - Jerry