2001 idle chug/sluggish acceleration
 

Everything I've read about this problem indicates one of the easy fixes is checking the MAF - but every diagram i see does not match under my hood. The MAF is supposed to be inserted in the pipe from the filter to the intake, there's nothing but pipe in mine. Haven't seen anything to indicate where the MAF is otherwise.

Help?

Also planning to clean out the throttle this weekend if i can't find the MAF before then