Check the duct work for crack loose clamps also check the air filter housing make sure it is closed and sealed properly.
Also have you checked to vacuum line going to the DPFE (Differential Pressure Feedback) Sensor. Make sure they are in good condition.
One other thing you can try, disconnect the MAF Sensor, it should switch to its default setting and run normally, take for test drive report back with results.
Thursday, October 7th, 2010 AT 8:49 PM