Hi all

just for interest...

When i lock the BLM and INT to 128, are there still corrections made, when the ecm switches from open to closed Loop?

ECM 727, $8D

or is this "closed Loop with open Loop values and no corrections"

thank you

 

The proportional gains are still active. With the short and long term fuel trims being locked in place (INT & BLM).

RBob.

 

hi RBob

does this mean, that corrections to the VE tables (fueling over all)are still applied?

thanks

 

The proportional gains are used to force the AFR to oscillate.

There won't be any fueling corrections as the INT & BLM are locked at 128.

RBob.

 

I do this when dyno tuning
for WOT or running at the track.

 

thanks!

so, this would be a form of closed "open loop" only difference would be the closed/open loo flag in Datamaster?

anyway, this is as i said, just for interest...

it seems, i cannot make the engine happy in closed loop, will try open now!

 

Could be your O2 sensor isn't hot enough, do you have a heated O2? headers?

 

Hi

yes, have a heated O2...i think my cam is screwing off the "tune"....