Thanks for the response...
I took the solenoid valve apart and cleaned it with some mass air flow sensor cleaner spray and it works perfectly now.
I have attached a photo with an arrow pointing at the part I cleaned. ( I'm guessing that is the exhaust valve you mentioned ? )
The process of removing this valve wasn't to complicated.... but if anyone is planning to do this be sure to take plenty of photos to reference valve placement, and also what plugs go where as there are a fair amount of cables that get unplugged in the process of removing this valve assembly.