Bought the 1991 Eclipse 2.0 recently. It idles very rough after warming up to the point it will often quit if I don't give it some gas when I'm at a stop light. It runs great when traveling down the road.

Here are some details:

1. Maintenance/Repair: Oil change, new plugs, new alternator, replaced exhaust flex pipe, new air filter, sprayed a significant amount of throttle body cleaner into the throttle body.
   
2. Checked vacuum leaks by spraying throttle cleaner around vacuum hoses I could see on top and around valve cover. No noticeable change in RPM
   
3. Regarding the Mass Airflow Sensor
   1. Unplugged and plugged back in the wiring harness while the car was running. No noticeable change in RPM.
      
   2. Opened the air filter chamber to access and inspect the MAF sensor. Noticed two of the
      "squares" on the laminar flow screen were plugged.
      
   3. I have not checked for voltage (12 & 5) on the harness plug yet.
      
   4. I noticed the two sections of the air filter housing where the MAF sensor resides does not have a tight seal when put together with the three clamps. Would that make a difference in the functioning of the MAF sensor?

I would appreciate some suggestions on what else I should be checking. Thank you.