maf problem

[mattyh24hdi]

I am still using standard papaer filter atm but will be upgrading. I don't understand where the cold air feed comes from though as it just points at grill. Basically mine feels okay low down power and plant your foot and nothing happens. But then next time I get in and drive or ten mins down the road it could boost really hard how it's supposed to. It has even ran fine from cold. Just doesn't make sense. Unless it could be flyby sensor thing?