does it throw any codes? Check the EGR valve...my old one was doing this and I had the injectors cleaned and fuel filter replaced several times and it turned out to be the EGR valve.
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2003 Alero
2.2 5speed
Grey
1996 GMC Yukon 4x4
5.7 liters of gas suckin power!
33x12.5r15 Mud Terrians on 15x10 wheels
111,111,111 x 111,111,111 = 12345678987654321
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