I am currently tuning a customer car, 2009 Chrysler 300 5.7L Hemi Automatic, that has had mds deleted along with a larger than stock camshaft.
My issue is that any change I make to either bank 1 or 2 VE table, the vehicle does not respond. I am currently just trying to get fuel trims down at idle before moving up in the rev range. The customer did not physically lock out or limit the VVT cam gear so VVT is still fully functional.
In the factory tune, the neutral network is already disabled (I have tried enabling it but no change). I have found that if I disable the exhaust cam, the VE tables will function as expected. However with exhaust cam enabled, the logged base VE remains at about 72-74% at idle no matter what is in the VE tables in the tune. This then leads to trims pulling around 30% fuel.
I have attach both the factory tune and the current tune I am working on(I am aware that the VE values in this modified tune are very low in the idle area, reason being was just to exaggerate the difference in the logs).
I have also attached 2 logs, one with exhaust cam enabled and one disabled. The only difference in the tune with these logs is the exhaust cam enable/disable function. The VE tables in both of these logs are the exact same, however you can see the EC enable log reads about 73% and the EC disable log reads about 46%(which follows the table).
I have read some forums about similar issues with 2009 chryslers but have not been able to find a solution.
Tried to be as descriptive as possible but if you need any more info please let me know.