Rod Stewart
Active Member
So I was down to the local dealer, Kanes HD, today, just to pick up some stuff for under the tree "from Santa".
I got into a big discussion with the resident tuner there and he told me some interesting news about HD's EFI system.
Does it ever seem to you that when you stop for gas when your reserve light has come on, that once you get going again the bike seems to be running better?
It seems there is a good reason why this happens.
Quite by accident he made a discovery while tuning an '04 Ultra on the dyno using an exhaust gas analyzer. At first the mixture was just about perfect, then suddenly the reserve light came on immediately followed by the mixture going very lean.
So he tested this by putting in some gas while it was running in cruise mode on the dyno, and as soon as the reserve light went out, the mixture was right back on target.
His theory is that the EFI is programmed to go to lean mixture and reduced power mode so as to get more mileage out of reserve. He has talked to the regional HD tech rep about this, but no one has confirmed anything.
Glider, is this something you or anyone else is familiar with at all?
Rod
I got into a big discussion with the resident tuner there and he told me some interesting news about HD's EFI system.
Does it ever seem to you that when you stop for gas when your reserve light has come on, that once you get going again the bike seems to be running better?
It seems there is a good reason why this happens.
Quite by accident he made a discovery while tuning an '04 Ultra on the dyno using an exhaust gas analyzer. At first the mixture was just about perfect, then suddenly the reserve light came on immediately followed by the mixture going very lean.
So he tested this by putting in some gas while it was running in cruise mode on the dyno, and as soon as the reserve light went out, the mixture was right back on target.
His theory is that the EFI is programmed to go to lean mixture and reduced power mode so as to get more mileage out of reserve. He has talked to the regional HD tech rep about this, but no one has confirmed anything.
Glider, is this something you or anyone else is familiar with at all?
Rod