Abdullah

iTrader: (2)

i have the below SD tuning WB method. i got it from the
LS1_tuning_info_1.40r.doc document page 37.

you can find the document in this URL :

http://www.hptuners.com/forum/showth...838#post144838

i want to be sure of step 3 and step6 in the below method are they correct or not?

and i want your opinion in general for the whole method below is it correct or not?

thanks.


Step by Step for SD tuning Wideband Method: dum

1: Unplug MAF sensor

2: Disable the SES lights for MAF codes P0101, P0102, P0103 (No check engine light.) Do not completely disable the codes or the PCM will not fall into SD mode. Only turn off the SES light, DO NOT DISABLE THE CODES THEMSELVES!

3: Change all points to 1.13 in the Open Loop F/A vs ECT vs MAP table (commands AFR of 13.0)

4: Change all points in the Closed Loop Enable Coolant Temp vs IAT table to 250* (Disables closed loop)

5: Copy High Octane table to the Low Octane Table (computer reverts to low octane table when MAF is unplugged, this assure’s optimal timing)

6: Change all points in the Power Enrich Fuel Multiplier vs RPM table to 1.0 (disables PE mode)

7: Use your wideband and HPT histogram to verify AFR of 13.0 dum

8: Make adjustments to the VE table accordingly to dial in a 13.0 AFR using
the desired formula - current afr/13.0 = VE multiplier
example: cell @ 1600 rpm Map 50 is showing the air/fuel to be at dum11.7dumin the histogram. dum11.7/13.0=0.9 Lets say that your VE table has a value of 48 listed at 1600 rpm, Map 50. Using the above formula you would multiply that value times (.9). 48*.9=43.2. 43.2 would be your new VE value. dumContinue using this formula until all data has been plotted.

9: Hand smooth VE as described by Magnus (a smooth VE results in crisper throttle response), upload new .bin and repeat steps 7 and 8 until all cells in the histogram are 12.8 - 13.2.

10: Change all points in Open Loop F/A vs ECT vs MAP table back to stock (re-enable stoich commanded AFR) see step 3.

11: Change all points in the Closed Loop Enable Coolant Temp vs IAT table back to stock (re-enables closed loop operation and fuel trim leaning) see step 4.

12: Change all points in the Power Enrich Fuel Multiplier vs. RPM table back to stock (re-enables PE mode) see step 6.

13: Use wideband and PE table to dial in desired WOT AFR. (Optimum HP at WOT).


thanks for help.

Engine_HP

iTrader: (1)

here u go http://www.hptuners.com/help/vcm_edi...to_user_sd.htm

1fstGM

iTrader: (13)

TTT For a good thread.

Kurtomac

iTrader: (5)

why are you guys disabling PE?....IMO set Commanded fuel when in open loop to 14.68....Set your PE as you desire....i would suggest 13.1 down low blended to 12.5 in the upper RPMs....and tune from there....when youre SD tuning youre tuning your VE table....whatever you command it should be actual if your VE is nailed or close...no reason to disable PE and command 13:1 all the time
EFI live tuning here

nikon1999

iTrader: (22)

if you upload a SD operating system into your car these steps are unnecessary correct? In terms of disabling codes.