Hey guys, I need help! Getting a #3&4 VVA high current code. I used to get 52-55 pounds of boost but now I’m down to 40. Tested the ohms on each solenoid and they tested fine.
What is the best repair and why is this effecting my boost?
Flying blind I would be checking back to the head wiring harness back to the external harness if your solenoids ohmed out to spec. I'm sure someone else can chime in more up on these motors, I'm tearing into a similar project on my Acert in a couple of weeks.
IVA faults active will have fueling derate and loss off boost.
I would start with replacing the pigtails on those two IVA solenoids. Ohm out the solenoids for good measure. If the solenoids are open they are available in 2 valves per kit. With old brittle harness look forward to pulling the base and replacing both UVC harness's. Poorly routed harness can rub on moving engine parts as well.
The above is most common and the issue could lie anywhere between the ECM and the solenoids.