Well I had my truck inspected today......failed New York State emissions. HC - 387/300 allowable, CO 6.75%/3.00% allowable. Does anyone have any ideas on how I might lower emissions without breaking the bank in the process? I dont have cats, but with my old 350, HD emissions VIN code M my results were HC - 44/300, CO .75/3.00%....and yes this test was done legitimately.......but at any rate I was amazed. The shop where I had my exhaust job done spot welded the pipes so its gonna be very hard to get cats in there w/o gettin a whole new system..........and I dont wanna get a whole new system. My carb was too fat (Holley) so I leaned it out when I got the truck back. Now she idles at about 620 as opposed to like 950......and doesnt like to start up as easily as before (I have to tap the gas as I crank the engine or It'll fire on the first turn of the starter then die.) On the flip side, the exhaust smell is nowhere near as strong as it used to be, so i'm guessing that there are far fewer unburned hydrocarbons there, but I dont wanna bring it back to the station until i know i'll pass. As always, any advice would be greatly appreciated.
(GVWR is 8001-9000 as per the vin number)
1985 Scottsdale 3/4 ton
14 Bolt SF, SM465/208, 355 CHEVY