pero yung sa kakilala ko na gumagamit (civic 98), his purpose is to reduce upward glare daw.
yung dapat matakpan yung sa baba diba po? kasi low beam is reflecting from the upper part of the headlight. if he covers the upper part, he covers the lower part of his aim.. making his low beam no aims on the road.
Puwede i try, 1. Palit air filter 2. Linis throttle body 3. Linis MAF sensor 4. Check spark...
high idle RPM at engine start