Trying to use an LS9 MAP with my turbo LS3 headed LQ9. What needs to be done for this to work properly with the 99-02 pcm? Tuner is using efi live with a custom operating system. Any help would be appreciated!

 

Set the MAP scaler [in Engine Diagnostics section] so MAP reads barometric at key on engine off.

 

We did that, but it still didn't like it. It was way to rich at idle and freaking out the injector pulse width, upto 30ms. We have tried both the LS9, and an old 3 bar brick both with the same results. Is there a different table or setting that needs to be adjusted in EFILive for them to work? Stock one bar works perfect on the dyno anyway, been upto 13psi so far.

 

What did SAE.MAP read (in kPa) at KOEO and at idle...?

Did you correct the VE and/or MAF tables...?

The COS has a boost VE table, did you fill in and correct this...?

Are you exceeding the PCM's MAF limit (512 g/s)...?