2000 lm7 first full idle tune and scan

[Johnsz28]

New to tuning finely got it to start and hold an idle without having to peddle it. Looking for help to see if I'm headed in the right direction I cant drive it yet still have a lot of body work to do and more but i do need to be able to drive in and out of the garage.
stock lm7 intake and injectors
4.8 pistons
long tube headers
btr truck norris cam 212/22X .552/.552 @.050 107 lsa
reworked wiring harness and stock ecu red and blue connectors
the attached log is from cold start all the way to full warm up after that I did 5 seconds at 1500,2000 and 2500 rpm
It looks to me like I'm still on the rich side am I correct. I'm trying to learn. no wide band yet but I know I'll need one.

[blindsquirrel]

Why is closed loop disabled if you are not tuning with a wideband? How's that supposed to work?

[Johnsz28]

ok so I'll enable it thought I need to so it would stay with stft

[blindsquirrel]

I would do LTFT+STFT, in closed loop. Add a filter to remove all the data that's not EQ = 1 (e.g. open loop warmup/PE).

[Johnsz28]

May sound stupid but how would i do that I just went back and put all o2 stuff back to stock settings foe closed loop enable coolant temp vs Iat and open loop EQ ratio

[Johnsz28]

84 z28 2-18-24.hpt

[horsepowerguru427]

Just clone your STFT histogram and change from STFT to Parameters>user math> LTFT+STFT instead.

https://forum.hptuners.com/showthrea...PE-filters-etc

This link should explain the filtering you need.

[SiriusC1024]

Like this:

VE.png

MAF.png

Axes are derived from the respective tune tables. Right click copy axis in the tune. Copy-Paste Special % or %-half the scanner results back into the tune table.

After every tune update (not log) you have to use VCM Scanner>Vehicle Controls & Special Functions to clear LTFT's.

[Johnsz28]

Ahh I've seen that before. A picture is worth a thousand words. Been at this for weeks

[Johnsz28]

Should I just get the wide band now and follow this

https://forum.hptuners.com/showthrea...s-vs-VE-Table-

[SiriusC1024]

Wideband in conjunction with the fuel trims. When PE enables that sends it to OL, so the wideband is used here. Are you having difficulties with CL corrections?

[bk2life]

Add a filter to remove all the data that's not EQ = 1 (e.g. open loop warmup/PE).

can you post such a filter so we can see what it looks like?

[SiriusC1024]

Here's for wideband EQ. Stoichiometric lambda = 1. If you used AFR instead you'd make the 1 be whatever AFR is set as stoichiometric in the tune.

wb eq filter.png

For CL fuel trims, to exclude all data where EQ isn't 1, then you'd make the filter function [50118.238] = 1.

[bk2life]

Here's for .

thank you

[Johnsz28]

Man I'll tell ya just having trouble everywhere totally new to the tuning so figuring out where to start gets a little overwhelming but I think once I get going it'll get better there's just so much info. I appreciate the help.

[bk2life]

figuring out where to start.

No sir, they are all the same.
Youve got to get it running/idleing first beofre anyting else.

Have you followed the idle instructions? https://forum.hptuners.com/showthrea...e-(w-pictures)

From there Ve and MAF tuning using narrow band O2s up to about 3000rpms.
Anything hihger or WOT needs a wideband set up. No ifs ands or butts.

I like to get them up and running and driving to check for leaks and trans shifts, brakes work etc. Get the MAF and VE tuned up and then head over to the dyno for several WOT runs. After that a few weeks of datalogging in all types of driving and you'd be GTG