Hello new to the Saturn world here! I just got an amazingly clean 2009 Saturn with the 2.4 ecotech! It has a code for p0171 and runs slightly roughish at idle and idle bounces around 750-830 ish. I believe it is a bad maf sensor as g/* is about 1.78-2.40 at highest at idle and when reved to 3k it hits around 9 g/*. Shouldn't it be more like 4 or so g/* at idle and closer to 20 g/* at 3k rpms? I couldn't find what the ratings should be but, my 4 cyl Audi has higher g/* at idle and when revved. I have pics of my reading but for some reason they won't upload? Any input is appreciated trying to see if my readings are off before I spend 65 bucks on a new maf

Liters and g/sec are close in these engines. 3.8L will have close to 3.8 g/* at idle....
What is the fuel pressure doing?

I can can check the fuel pressure in morning. So with it being a 2.4 it doesn't seem like it'* really to far off?

Yeah, I wouldn't condemn the maf based on those numbers.

What carfixer007 said ^^^^^^^

. . . and:

How many miles on it?

How many miles on the spark plugs?

Do you know anything about the car'* history?