Hey guys! I posted last week about an issue with my 85 900t16, The idle was getting worse i decided to clean the maf long story short my idle was worse. I bought another maf and its still doing the same thing ( flying up 1k rpm then to 0) Eventually with the maf it does settle at 900 rpm but as soon as i step on the gas and let go it goes back to bouncing.There is black smoke coming out of the tail pipe so i know its running rich. I Want to know if there is anyway to test it the wiring or maybe ecu? I tested the o2 sensor but its good and voltage is in spec.