On our 1997 accord the interior blower fan only blows of you rap or tap it first. :( The blower fan under the dash looks like it goes in from the bottom. Is it fairly easy to replace and how? I downloaded a picture of it but don't have a manual. Any help appreciated .:)

I took my 1999 Nissan Quest for a smog test and it passed everything but the ignition timing (10BDTC). A day later a certified mechanic adjusted my timing to 15 and did a major tuneup, oil change, etc. The NEXT day I went back to the smog station and the timing passed (now at 12 BTDC less than 24 hours after seeing it at 15 BTDC with the mechanic). Fine, but now all the emissions numbers have tripled and thus FAILED the inspection. All the other numbers remained the same or very close. I've spent hundreds or dollars already and can't afford a wild goose chase, and fear what huge repairs will be suggested on my car with 100,000 miles. How could my emissions numbers change so drastically in two days? Could the timing adjustment do that? Would the No (PPM) numbers really jump three times from two days earlier? Could it be as simple as my car wasn't warmed up enough that this time the NO numbers went from 500 to 1295, and 575 to 1490? Help, I've alerady spent more than $600 on car repairs in 2 days hoping to get this to pass.