missing at idle
 

2009 lt 2.2
i have a problem, first let me say i do not have any codes coming up.
i makes it hard to fix this issue it seems to do it more often the missing
when i am trying to park (surging)
does my LT have a fuel filter and where is it now a filter clogged would do it all the time
last thing a air leak
all the codes that came lit i fixed

If there are no codes there are no misfires.
Fuel filter is the sock type, part of the pump.
What codes did you fix and how?

there is allot
 

lets start from the beginning i bought this car just a month ago or so ago now has 95xxx miles
poo14, po102, po113, po300, po351,
the last 2 where later on po172, po353
i tune it up new filter plugs thermostat air cleaner other fixes not related
replaced one coil intake & exhaults sensors,, maf sensor it looked new so i just cleaned
cleaned the trottle body it was dirty like it was never cleaned
as of now it has been over a month and no codes came on
just wondering about the miss (surging)

Why intake and exhaust SENSORS, not SOLENOIDS?
P0102,P0113, and P0172 are related to the MAF or it's wiring. And can cause P0300
Why change only 1 coil? Was P0353 after you switched coils in testing? Is that when the P0172 came up?

That sort of surging usually has something to do with forgetting to plug the MAF back in or not getting it plugged right. That does not always trigger a CEL.

Try some contact cleaner and dielectric on the MAF connector and inspect the plug.