Lean Cruise with COS5?

[ferocity02]

I'm currently running COS5 2bar OLSD, but will probably go to the semi-open loop (SOLSD) soon once the VE table is good.

Lets say I have B3647 set to 1.0 in the cruise area, so normally it would be in SOLSD. And I have lean cruise enabled to remove 0.09 from the EQR (gives ~15.6 AFR assuming E10). Once the lean cruise enablers are met, will it completely ignore B3647 and also no longer attempt to use the STFT's for trimming?

[andysc3]

I just have my commanded fuel tables command richer in my cruise tables. I have my tune posted in my g/cyl thread if you want to take a look at how mine is. But I'm running a cos3

[ferocity02]

You're doing a rich cruise?

[andysc3]

Oops. I ment lean. Commanding 15.6. I like to keep my tunes simple. I don't like having to rely on other tables to trigger to get the lean cruise to activate.

[ferocity02]

Yeah that would be simpler, but I like the idea of setting the speed and ECT enablers for lean cruise so its not trying to go lean while puting around town and bucking.

Just want to make sure the semi-open loop isn't going to try to be active during lean cruise.

[Chevy366]

I ran a COS3 tun with Lean Cruise. Seemed to work fine.

[andysc3]

No surging issues here. My rpm/mph and kpa is very predictable and makes it easy to tune that way

[ferocity02]

No surging issues here. My rpm/mph and kpa is very predictable and makes it easy to tune that way

With a manual gearbox the surging/bucking is far more noticeable. Decelerating when lean is the worst. I need to richen up decel or re-enable DFCO.

[andysc3]

Mine goes rich on decel. I need to figure that out. It does down to 11.5-12.5. But I'm running FIC 1000cc injectors and I can't control the min pulse with

[ferocity02]

Mine goes rich on decel. I need to figure that out. It does down to 11.5-12.5. But I'm running FIC 1000cc injectors and I can't control the min pulse with

Yeah I had that issue too with their injectors, their data is not correct. Pm me for more info.