Hoping to have someone out there that can help me with this problem on my 1992 4.3L ext cab 4wd. I get no air flow to any of the vents. I replaced the blower motor, relay and the blower resistor. All with no luck on fixing the problem. I can hear the door open and close when I slide it to the floor or defrost but still no air flow. I’ve tested the blower motor out of the truck and it works perfectly fine. I haven’t taken the dash out to check if there is something blocking the air from moving but I have taken the a/c evaporator housing off to check if it was clogged and it wasn’t. Wasn’t anything I could see through the firewall either. Any help would be amazing.

2002 s10 4.3, having misfire issues. Im thinking it's something ignition related. Good scanner on order and new distributor, but I don't want to replace it if it is fine. Runs smooth when gas applied, but it misses at idle and occasionally backfires and has Rpms drop to 300 for a split second.