If I have an ARD Blue tune with the SAS delete in software, does the diode mod do anything for me additionally?
Reason being I noticed the last time I plugged in Vol-FCR I had two codes but no CEL: EFI-442, EFI-448. The relay and solenoid are still plugged in, just the pump has been removed. I capped the solenoid where it would lead to the valve on the exhaust, but it it is still getting vacuum from the tree.