6.0 sd tune?

[pewter02z28gs]

ok i switched to sd and i still have maf dtc's.so when i turn them off will this disable just the ses light or will it remove the dtc as well cause the car runs like crap as im assuming its in limp mode. anyone?

[Bill@HPTuners]

it depends how you "turn them off" if you set them to no error reported your car will run like crap.

[pewter02z28gs]

ok so how should i set them, and why will it run like crap with it set to no error reported i thought that completely removed it ?

[Bill@HPTuners]

If you unplug your maf & then set the codes to report no error your telling the pcm "yeah the maf is unplugged but everything is just peachy"

[pewter02z28gs]

yeah well isnt that what i want since im no longer running the maf?

[arthansen]

What you want is to have the PCM ignore the MAF but go into SD mode. To do so you need to let the MAF fail. Therefor, you can't just ignore the codes.

The help file has a really good section on SD tuning. Go to

http://www.hptuners.com/help/

and search "SD". The section you want is step 11. It states....

11. Set MAF fail frequency to 0.
The PCM will detect a MAF fault as soon as you key on and thus revert to speed density mode.
The PCM requires a MAF DTC to be set to revert into speed density mode. If you set all of your MAF DTCs (101, 102, 103) to no error reported the PCM will not revert to speed density.
The factory settings will work but if you are concerned about an SES light, set the DTC's to No MIL Light. The PCM will still set the code for a MAF fault and thus still revert to speed density.

Hope this helps.

[pewter02z28gs]

ok i have also converted it the tune over to sd and then write entire so do i need to load back the stock tune?

[Bill@HPTuners]

you don't need to do a write entire unless your changing operating systems.

[madmatt9471]

What you want is to have the PCM ignore the MAF but go into SD mode. To do so you need to let the MAF fail. Therefor, you can't just ignore the codes.

The help file has a really good section on SD tuning. Go to

http://www.hptuners.com/help/

and search "SD". The section you want is step 11. It states....

11. Set MAF fail frequency to 0.
The PCM will detect a MAF fault as soon as you key on and thus revert to speed density mode.
The PCM requires a MAF DTC to be set to revert into speed density mode. If you set all of your MAF DTCs (101, 102, 103) to no error reported the PCM will not revert to speed density.
The factory settings will work but if you are concerned about an SES light, set the DTC's to No MIL Light. The PCM will still set the code for a MAF fault and thus still revert to speed density.

Hope this helps.

A Dang great explanation!

Thanks,Matt