*SAFE MODE* & Codes: What's Wrong?

[Gregory]

I'm getting codes P0068 and P0101 when the Air Conditioning is on.
These codes throw the car into SAFE MODE. This is consistant and has happened four times.

I added 10% to the VE Table as the engine was enlarged to 6.6ltr from 6.0ltr.

I'm not sure what to do next. I disabled the codes, but would like a genuine solution. Any suggestions?

A log file with the A/C on is attached.

[BBA]

Increase the displacement setting to 6.6 then do a VE tune followed by a MAF tune.

[Gregory]

The displacement was increased to 6.6 liters a long time ago.
Were can I get procedures on a VE and MAF tune?

I attached a copy of my current tune.

[Bill@HPTuners]

do you have your stock file so that we can compare your modifications to this file?

[FastBlackTA]

Increase the displacement setting to 6.6 then do a VE tune followed by a MAF tune.

Can somebody provide some info on why this is important? Just curious, I'd like to see exactly how this plays a part in fueling calculations.

Thanks.

[Gregory]

The factory tune is attached so compairsons can be made.

Here are the specifics on the vehicle.
06 Quicksilver 6-speed GTO LS2-402, Livernois 3RL (2.1/1.57/57cc) heads, 246/250 .631/.631 114 cam, Harland-Sharp 1.8, FAST 90, Meziere, 42lb SVO injectors, SLP Pulley, Walbro fuel pump, Corsa, Dynatech headers, Lingenfelter CAI, 3.46 rear gears.

My next step is to look for MAF and VE config files and learn how to tune each of them. Any help that can be given is appreciated. This is new territory for me. I am told the goal is to get the Long term and Short term fuel tables as close to zero as possible on the scans.

[RWTD]

Well, for one, you haven't modified your P0068 test, nor modified your P0101 test threshold. Heck, just disable both.

You could also disable the VE altogether, and run solely off of the MAF (go to Engine, Airflow, Dynamic Airflow, set "High RPM Disable" to 200 rpms and "High RPM Re-enable" to 100 rpms).

As for your aftermarket rockers, I almost bet you have valve float past 6000 rpms, if not earlier. You should get the car on a dyno to determine this.

[Gregory]

RWTD:

I've attached the chassis dyno from September of this year. The chart very closely follows the chart from SLP as it is a 51015 camshaft with 1.8 rocker arms to make the .635 lift. The Livernois springs are good for .670 lift.

I've also attached my VE Narrowband and VE Short Term Fuel Trim Histograms. I've adjusted the MAF Calibration and VE Maximum tables to no avail. It stays rich.

I thought about changes to the High RPM Disable/Enable but the dyno shop said this should not be done as it is moving into GM Engineer territory.

I did disable (unchecked) the P0068 and P0101 DTCs in Engine Diagnostics > DTCs. Strangely, I still got a SAFE MODE. I'm not sure how this happened.

Oh, I also adjusted the injectors to closer reflect the installed 42lb units with a high flow pump. The dyno tuner used his table from his 402 as it has worked well for him. Thus, what started as 33lbs is now 43lbs.

Also, my latest scan after all the above modifications is attached.

Pending feedback, one of my next steps will be to buy an Innovate Wideband A/F measuring device.

[Russ K]

Make the changes as shown to disable codes P0101 & P0068. Also your not using all of your fuel trim cells. Set the LTFT RPM
& Map boundary tables as shown.

You need more idle spark timing to lower your idle map. Your idle timing is set a 28*, but your only getting 17* in the scanner.
I would lower the Base Running Airflow > Airflow Final Mininum table by a couple of g/sec at a time to see if the idle spark timing increases.

I would lower your main spark timing, 32* + the PE spark adder is too high.

You can use my .cfg file for scanning, just insert your brand of wideband in the table display.

Russ Kemp

[Gregory]

Russ:

Can I clarify when you say "lower your main spark timing, 32* + the PE spark adder is too high." Do you mean go to Engine > Spark Control > Spark Advance > Main Spark Advance & Idle Spark Advance? If so should I knock the High and Low Octane tables down by 5* across all the cells? I just want to make sure I have this correct.

Thanks!

[Delft Calais]

Pending feedback, one of my next steps will be to buy an Innovate Wideband A/F measuring device.

Definatly buy a wideband for tuning. the narrow bands are only so accurate.
its also good to have an inderpendent source for monitoring. Id be broke if it wasn't for my wideband, i cant imagine tuning my turbo with out one, id probably be onto another motor by now.

[Gregory]

All concerned:

I have to say "I really appreciate the feedback and suggestions." Some of the settings are a black art to me. I never would have thought that lowering the "Airflow Final Minimum table by a couple of g/sec" could change the timing advance, but it does. Amazing!

I think it's cool knowing so many of the settings are adjustable and relevant.

I'll post my most current results in a couple of days.

- Greg