I ported the MAF sensor yesterday (by removing the post), the screen had already been removed with no problems. I also ported the upper intake plenum (huge mold lines at seams on the inside mostly. When I started the engine ( EEC had been reset by battery being disconnected), I had a very high idle which I expected until the EEC recalibrated but it stayed very high until it went into closed loop, then stayed at about 1100 rpm's. Throttle was very sensitive, MIL on, apparently is running very lean. I drove it and it ran OK but was obviously too lean because it ran too hot even though it was only about 55 degrees outside. (180 thermostat). I put the air silencer back on (the air noise was much higher after porting) thinking that might help.
Any ideas?