i am from belarus and now repairing subaru leone 1986 1.8 MPFI , i have problem with engine -- when i starting it up it is working about 10 seconds at 3000 rpm and fade, without Maf sensor engine works at 1500 rpm, but unsteady, i think problem in maf sensor ? how can i check maf sensor ? i have no possibility to take other maf sensor , because subaru leone is very rare car in our country ( excuse me my english)