AutoVE tuning newly boosted car

[Jim_PA]

I'm into my 18th logging session now. My VE table just doesn't want to settle down. There are some pretty wild swings in it... Does anyone have some pointers?

The log I am posting was taken after flashing the tune file that is attached.

Besides the unruly VE table, it seems to be running very good. Much smoother than it ever has prior to adding the E-force SC, new injectors, etc, as shown by how nice the ve looks in those lower throttle cruising and idle areas... I am getting some occasional lean tip-in which is noticeable by a slight stumble or hesitation. Is the lean tip-in what I am seeing in the VE logs?

Do I need to decrease the PE TP% lower than 25%?

Over 4000 RPM or so it starts going rich, pulling timing, and it literally falls flat on it's face, but that's mainly because I haven't spent much time working on those areas yet.

I'd really like to get the VE more stable, as I've just been bouncing back and forth in a lot of the wild cells and not really seeing a change in the logs.

TUNE: Boost-Base_016.ctz RESULT LOG: LS1B_0126.efi

Data filter used:


Crappy VE table. I haven't spent much time in the higher RPM range yet:

[joecar]

Smooth out your VE tables, and start again (flatten out the spikes and holes).

Are you getting an immediate MAF DTC...?

[Jim_PA]

Smooth out your VE tables, and start again (flatten out the spikes and holes).

Are you getting an immediate MAF DTC...?

Yeah, the MAF is failing immediately. I think I've tried some manual manipulation in one of the previous 17 runs, but will certainly try again! - Thanks

[statesman]

Set {C2908} to 0.1

Generally, the only time I see people having problems dialing in the VE table is when they fit the crappy 60lb deka/mototron injectors that come with some supercharger kits.

[Jim_PA]

Set {C2908} to 0.1

Generally, the only time I see people having problems dialing in the VE table is when they fit the crappy 60lb deka/mototron injectors that come with some supercharger kits.

Will do! --

These are 60lb LS9 Bosch FIC injectors, I'm using the data that came with them.

[Jim_PA]

It's coming along, I still have a lean spike in the 100-105 MAP at 1600 and a few other areas but I'm ignoring it for now. I think I went way overboard when I beefed up the VE in preparation for tuning.

Seems like the bigger injectors are making the VE table more sensitive?

[joecar]

...

Seems like the bigger injectors are making the VE table more sensitive?

Yes, because they spray a significant fuel mass during their on-ramp and off-ramp.

[Jim_PA]

Watching the scanner (and afterwards the BEN map), I'm getting lean tip-in surges anytime I just nudge the throttle any amount at just about any RPM. It recovers very quickly and most of the time I can't even feel it.

6th gear it's running very rich 1500-2000 when I get in the throttle a bit (high 9's, low 10's AFR) - I imagine if I lean it out, it's going to go lean if I'm in another gear at lower speeds.

These seem to be the only issues I'm having, everything else is working out very well. I've just been ignoring these lean spikes and 6th gear rich condition and the MAP is looking good.

[joecar]

Post latest tune and log files.

[Jim_PA]

Most recent tune and log attached.

When does PE "turn off" Or is it always on once the PE enable conditions are met?


Boost-Base_022.ctz

LS1B_0135.efi