ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: TheRedHorseman on April 14, 2005, 10:42:48 AM
-
ok, I went and did the emissions/smog check today with my samurai. here is what I have: Weber 32/36 DGV carb with 45/50 jets, isky torquer cam, bored .020 over, stock compression, header, 2" exhaust with new catalytic converter.
my problem is, while I pass with flying colors on all other criteria, I cant get my idle hydrocarbon emissions down enough to pass. I am registering 348 PPM when the limit is 220 PPM. I'm idling at 1100 rpm, with an A/F ratio of about 16.5:1 according to my wideband O2 gauge. I do suffer from some slight misfires at idle, which may be putting me over the limit, but I'm not sure. I'm about to go so far as to run 25% denatured alcohol to make this thing pass, but I dont want to damage any seals with it.
what suggestions do you guys have to help me pass?
thanks in advance for any help.
-
2 ounces of acetone, but sounds like your idle is way too high, hows your initial timing ? I'm thinking advancing it 2-5 degs might get more complete burn
http://pesn.com/2005/03/17/6900069_Acetone/
-
I'm not sure what my initial timing is, as I time the engine by ear, and drive it. I advance the timing until I can get it to ping and then back it off about 1.5-2 degrees to maximize power without pinging. I have been told this is the "british style" of tuning. works for me so far, and I usually have it idle about 800 ish but the emissions guy told me to bring it up to 1100 and it did help with reducing the idle hydrocarbons. I am going to try denatured alcohol tomorrow on my friends urging. hopefully it will work
-
Seafoam does magic, for both ruff idles and emission test.
-
Hydrocarbons were just a tit high on my pickup last fall. I tossed 3 bottles of heet into the gas tank, drove 15 miles. 40 minutes after failing, it passed.
-
Re: the joy of emissions testing: questions......
« Reply #1 on: Apr 14th, 2005, 6:53pm » Quote Modify
--------------------------------------------------------------------------------
2 ounces of acetone, but sounds like your idle is way too high,
bandit86, what does the acetone do, and does it hurt anything?