No Fuel Trims !!

[tahoels1]

I have a el camino ls swapped an LS3 with P01 VCM and im having issues with the fuel trims not working,i checked the tune every thing looks on point (on my side) or there's something that I have to change. Even in the scanner I force the PCM to go into closed loop there is no changes in STFT and LTFT. ill post the tune and scan of the car and please if someone can chime in and help.lean no fuel trims.hplTUNE4 dtc adj.hpt

[85K5Jake]

Your proportional airflows are super high, the O2 sensors switch back and forth off these airflow modes and control fuel trims. The proportional airflow and integral delay control how fast or slow the O2 sensors switch to maintain stoich in closed loop. Your closed loop proportional starts at 128 g/sec and works up to 819 g/sec. stock truck engine airflow starts at 32 g/sec and works up to 71 g/sec. check out the attached tune go to Engine>Fuel>Oxygen Sensors. Scroll down to the bottom of the tab. Look at the Proportional airflow mode. Proportional Idle airflow mode. Integral delay. StockTunenovatstransdtcsdeleted.hpt

[tahoels1]

Your proportional airflows are super high, the O2 sensors switch back and forth off these airflow modes and control fuel trims. The proportional airflow and integral delay control how fast or slow the O2 sensors switch to maintain stoich in closed loop. Your closed loop proportional starts at 128 g/sec and works up to 819 g/sec. stock truck engine airflow starts at 32 g/sec and works up to 71 g/sec. check out the attached tune go to Engine>Fuel>Oxygen Sensors. Scroll down to the bottom of the tab. Look at the Proportional airflow mode. Proportional Idle airflow mode. Integral delay. StockTunenovatstransdtcsdeleted.hpt

Thanks ill see the tune you sent and will adjust the tables.
Will updateif there any changes.

[tahoels1]

I have copied the tables you told me about which is the airflow and proportional and integral the car still doesn't go closed loop and it drives me crazy ill post a scan of me letting it idles to get up on temp after that I also forced closed loop the values were +/- 0.8 and held there.fuel trim still not working.hpl

[85K5Jake]

I think your O2 sensors might not be wired correctly. Hook the scanner up, start your car and go to the Engine icon to check the DTCs. In the bottom panel for systems it should say complete next to O2 sensors. If it doesn't then the wiring is not correct for the P01 ecm you are running. What 02 sensors are you running? Are they the stock sensors for the LS3?

[tahoels1]

I think your O2 sensors might not be wired correctly. Hook the scanner up, start your car and go to the Engine icon to check the DTCs. In the bottom panel for systems it should say complete next to O2 sensors. If it doesn't then the wiring is not correct for the P01 ecm you are running. What 02 sensors are you running? Are they the stock sensors for the LS3?

The problem is that the car has p01 pcm and harness and the engine is an 2013 ls3 cammed from a corvette and the lingenfelter 58x to 24x and DBC throttle body
Every thing is mixed up the old tuner had it running but the car was stalling and lean in crusing.
The o2 sensors i think from a camaro !!

[Crysis]

Make sure everything is pinned correctly

[85K5Jake]

What year of Camaro for the 02 sensors?

[tahoels1]

What year of Camaro for the 02 sensors?

Its a 2001 camaro for the o2 sensors.
ill check the pinout and will updates you guys if there is something weird or incorrect.

[Ben Charles]

This can totally be done!!! I like mismatched setups.. if you need any help, PM me