Ok my max cranks up now and idle rough for a quik second but smooth out but da soon as I take off it lag power like I'm barely touching the pedal even though I'm flooring it I was told it was a maf sensor and I bought one and install but still same results so do I need to do something upon installing the new maf.....I was also told that a bad o2 sensor can cause this problem too any help or advice would be appreciated

 

Also its a vg motor

 

Check fuel pressure and cylinder compression.

 

might be the fuel filter...when I changed mine the car ran better