914-6 Won't Pass Emission Test, (never does...*&$#@^$% bullshit) Options

[Eric_Shea]

I sent Rich some numbers via e-mail but I thought we should post here in case we have some answers that may help others. I just failed both HC and CO. Stock 2.0 six.

ASM Emmission Test

HC 15mph:
Max - 509
Avg. - 109
Meas - 573

HC 25mph:
Max - 469
Avg. - 89
Meas - 401

CO 15mph:
Max - 5.07
Avg. - 0.76
Meas - 10.17

CO 25mph:
Max - 4.97
Avg. - 0.77
Meas - 9.57

I doubt these guys even attempted a hand at the enrichment screws. I used to take it there all the time when the owner would actually wrench on cars (old P-car mechanic... not that old). Now it's just a bunch of melon heads with computers.

The guy took about 10 minutes to bring my car out and then said "sorry it took me so long... I didn't know how to start it" (IMG:style_emoticons/default/blink.gif)

So... lean it out and...?? (IMG:style_emoticons/default/confused24.gif)

I'm no good at this shit... thanks in advance.

[ArtechnikA]

just my off-the-top -- i hate trying to do this long-distance and with no measuring instruments...

i'd guess too-rich idles or the mixture screws too
far out, and too much initial spark advance. maybe run midgrade gas
instead of premium -- too-high octane gas can result in unburned
hydrocarbons -- there's a note to that effect in the MFI references...

i've heard that it helps to have it HOT before taking it in, maybe run through a can of from-the-Chevron-station Techron.

and of course this presumes stuff like your plug wires and spark plugs are up-to-snuff and the air filter is not clogged -- all that "is it plugged in" stuff ...

you can open the valve clearance a little bit - takes out a bit of cam overlap, but that's really a PITA on a /6 ...

maybe there's something to that add-a-gallon-of-alcohol theory...