Richard Cox

What does the star wheel do and does any one have instruction
on how to.

infidel

The star wheel increases/decreases fueling at lower rpm/boost. Turning the wheel towards the engine will give you more low end fuel and smoke especially on takeoff. Turn the wheel towards the engine 20-30 clicks till the smoke is too much for you.

Richard Cox

infidel,
I have not look at wheel yet but do you mean that trun it clockwise will give you
more fuel at lower rmp?, and will this change the higher rpm fuel?, and why do I
want more smoke?

engcogod

The star wheel will only give you more fuel at the low end as infidel said. This has no effect at higher rpm's. When you turn the wheel clockwise you are increasing the amt. of fuel that is injected into you cylinders. And if you turn it too far then you will get a lot of black smoke, because the engine cannot burn the fuel fast enough......On my buddies truck I have the star wheel turned in just enough so that when he steps on it, a very very light amt of smoke comes out....But thats how he wanted it, he didn't want tons of smoke, but some guys on here do...

DZLPWR

Turning the starwheel toward the motor inceases fuel at low boost conditions, therefore, at the lowend of the rpms when boost is low.
When at higher rpms the boost is high , so the starwheel adjustment is canceled out because it is only for adjusting low boost fueling.
Adding more fuel without adding more air = more black smoke. In most cases adjusting the starwheel all the way forward will produce a bit more smoke, but nothing accessive. You will get a little increased throttle response and low boost power(low rpms), resulting in a little faster spool-up. At higher speeds, its harder to tell. Mostly at start off you can tell.

infidel

I never describe turning the star wheel by the clock because it depends on which side you are looking at it from.
The top of the wheel that you see turns towards the engine for more low end fuel.

PumpDaddy

Don't ya'll mean turning clockwise is more smoke, counter clockwise is less smoke

Richard Cox

thanks to everyone for info guess I will play with it a little bit to see if it will get my trailer rolling a little quicker.

DRM

you guys want a short tech write-up with pictures on turning the star wheel? Give me 10 minutes...

DZLPWR

If you are standing, on the drivers side of the truck at the enginebay looking at the Inj. pump, you turn the wheel towards the motor. Unscrew the big allen plug on top of the AFC and look inside at the wheel with teeth on it. You will know exactly what to do.

DRM

If someone knows the size of the allen wrench used I will add it to the page

This makes it about as clear as I know how

http://www.4x4spot.com/12v_ctd_afc_adjustment.htm

MnTom

The allen wrench size is 8mm or 5/16"

Lil Dog

I used 8mm to open the access plug as most of the engine is metric..

J-eh

cwbronc

What kind of things should I worry about if I decide to bump up the star wheel? Do the EGT's go up much? I don't have gauges so will that matter? Thanks-Cody

DRM

I added that it is an 8mm allen - thanks