New To Tuning - Running Very Rich

[dan.falzone]

Hi, I am new to tuning and I need help with my very rich tune.

I just built a 5.3 LM7 with a mild cam. I started with disabling VATS and tried running it with just that. It would start and die. If I held the throttle open just a little, it would run for a few seconds before dying. It is very rich to the point that my eyes are burning and the plugs are wet. I made some changed to the tune for the cam like raising the idle RPM to 750 and raising the base running air flow among a few other things according to what I found here. It now will start and run if I hold the throttle open a little. I can rev it up without an issue and, as long as I don't completely close the throttle plate, it will remain running. But it is still very rich. What I need to know is where to start attacking this.

I made an original write-up with what I have and was doing. https://forum.hptuners.com/showthrea...w-to-HP-Tuners

I have the tune with VATS disabled, the injectors changed, and the 4L80e segment swap. I also have the current tune with what I changed for the cam.

[DougO]

Add some running airflow, one of your O2 sensors doesn't seem to be working correctly, try and get it up to temp.

[dan.falzone]

Thanks for the quick response. Any idea how much to add? I assume you mean to the Idle Airflow vs. ECT table. As for the O2, I currently only have 1 hooked up. I ordered another and will put it on when it comes in. Currently running on an engine stand.

[dan.falzone]

So I just upped the Idle Airflow from 8.6 to 9.6 and it looks like it made no difference. One thing I did notice is that I have a P0341 code. This is a ground up rebuild so I replaced all of the sensors with OE replacements from Rockauto, and it has an upgraded cam shaft from Summit that is designed for this engine. Not sure why I am throwing that code or if it is why it keeps stalling.

Here are the DTCs, I have not removed the EVAP DTCs yet but the system is gone.

0x10: P0200 - Injector Circuit (Pending)
0x10: P0341 - Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or single sensor) (Pending)
0x10: P0405 - Exhaust Gas Recirculation Sensor A Circuit Low (Pending)
0x10: P0443 - Evaporative Emission System Purge Control Valve Circuit (Pending, Current)
0x10: P0449 - Evaporative Emission System Vent Control Circuit Intermittent (Pending)
0x10: P0452 - Evaporative Emission System Pressure Sensor/Switch Low (Pending, Current, History)
0x10: P0650 - Malfunction Indicator Light Control Circuit (Pending, History)
0x10: P0748 - Pressure Control Solenoid A Electrical (Pending)
0x10: P0753 - Shift Solenoid A Electrical (Pending, Current, History)
0x10: P0758 - Shift Solenoid B Electrical (Pending, Current, History)
0x10: P1637 (Current, History)
0x10: P1860 (Pending)