Engine/Transmission (1994 - 1998) failed emmision test AGAIN

[Hootguy]

Well,,failed it again,,it's an opacity test where they still a probe in the exhaust and rev it to the gov,,while in park,,

I have a DD cam plate not all the way forward,,DD AFC kit with boost elbow,,

It started out good,,first 2 snap tests were 25%,,,then 48%,,then 37%,,,limit is 30% overall,,

SO can anyone refresh my memory as to what to do to bring the fuel to full lean,,to be sure i pass the next test,,

If i remember correctly to lean out the fuel,,you move the cam plate all the way back. . the AFC housing all the way forward toward the front og the engine,,and thighten the hell out of the AFC spring,,,is this right,,,

I usually have to go full lean to ensure a pass,,

The emmision test truck is mobile so it comes to my place,,so i dont have to worry if the truck can't get out of it's own way it's so lean,,

Sucks,,these stupid emmision test are such a money grab to keep those fatcats DOT people in their job,,,

And on top of that,,i run 75% biodiesel,,so the smoke i do produce doesn't even pollute alll that much,,,compared to a freakin city bus,,,which dont need to pass emiisions testing by the way,,

Hope someone can give me some pointers,,,

At this point i'm tempted to find the same truck in a 2500,,since it only gets a visual test $35. 00 instead of $140. 00. .

 

[LandShark]

I would try putting the star wheel back in the OEM position first. I'm assuming it's been turned a fair amount to get early fuel at low boost.

I thought using biofuel produced less smoke?

 

[ata]

Cam Plate all the way back. AFC housing all the way back. Star Wheel turn top away from the engine is going back. Man that will make a real PIG out of it but it should NOT SMOKE.