2003 Toyota RAV4 bogs down when accelerating

when accelerating hard the motor bogs down.flue system at 50 lbs,exhaust system checks, replaced the mass air flow system sensor

So Skip, is the check engine light on? What are the codes?

What is a flue system at 50 lbs?? Do you mean fuel pressure at 50 psi? How does the exhaust system check? Why did you replace the MAF?