I was driving along on main today and a light was going to turn red. I was going 30-35 mph in 3rd gear. I stepped on it to make it through the light in time. In the process I made a huge cloud of black smoke. I don't want to do that. I just want it to go if I need it to go. I have tried adjusting the star wheel up, but it still does it.

I am running a Denny T fuel pin. Would an M3 clear up my low end smoke? This is the 2nd or 3rd time I have smoked out main street, and I would like to not do it anymore.

 

Maybe stopping at the red light would help clear up the intersection...? I know it wouldn't be my first choice but if it came down to what other people thought of me... i might actually think about stopping.

 

I was gonna say a better responding turbo, but you have it already. Guess you are just going to have to remember to downshift, then hammer on it. A lugging engine with advanced fuel delivery will smoke like crazy.

I do it all the time. Smoking out the street that is. If you want better answers you can always send me your turbo and I can do a long term test on a better turbo. LMAO

 

To JustRamit: The light wasn't red. If I maintained the same speed it would have turned red by the time I would have gotten there.

I'm not looking for posts about my driving style. I am looking for the answer to the question at hand.

I think I am just going to try the M3 anyways. I already have my Denny T sold to my brother.

 

Where's your star wheel and smoke screw set? Is the pin riding as high in the bore as possible to give you minimum fuel at zero boost?

 

Was wondering if a less aggressive pin would help with towing as well.

 

It just seems to me that anytime you "step on it" in a turned up diesel regardless of where your fuel pin is located, you will get a cloud of black smoke. My truck did it as soon as i played with the fuel screw. Its the position of your foot more than the fuel pin, the fuel pin takes affect when boost kicks in, and that clears up the extra fuel you keep throwing down the cylinders.

 

The fuel pin profile can really help with low boost smoke. You want to hold the fuel off until you build some boost, then pour the fuel to it. The right profile will help as long as your smoke screw and star wheel settings are not interfering.

 

john-your at higher elevation like me. i really limit pre boost fuel with the afc cone-(fuel pin)

 

The m2 pin is a better low boost low fuel pin. I actually had to put the smoke screw down some because I could not even take off in 2nd gear without stalling it. The m2 puts out way less fuel at low boost then a stock pin.

 

I have never touched the smoke screw. I don't even know where it is, lol, I have messed with the star wheel though. I don't remember where it is now compared to where I started. Before I messed with it the truck hardly smoked at all.

I've been driving the truck tonight and have been trying to clean up the smoke from a 30 mph roll by turning it CCW 1/4 turn at a time. The cloud still remains.

Here's a question. The 13 mm bolt that the starwheel sits in... If I don't hold it while I adjust the starwheel, am I wasting my time> I turn the star wheel and the big bolt turns with it.

 

1/4 turn is nothing, adjust it in 2 turn increments.

Back the smoke screw all the way out.

I think you might be confusing the smoke screw with the star wheel?

 

I put in a valet switch it works really well for towing and the beat the stop light pedal stomps.

 

i think a start would be adjusting the smoke screw out a bit. that is, if you've adjusted it. that will set your no boost (or base) fuel delivery. although, adjusting the starwheel up from where it is would probably help as well. that will set a higher tension on the spring below the diaphragm that the fuel pin bolts to. higher tension will keep the pin from dropping until more pressure is present in the intake manifold.

i haven't touched my smoke screw because it's described by what it produces . my starwheel is bottomed right now and if i'm at a slow roll in 3rd and stick the pedal to the floor, it will lay out a decent cloud but cleans up once the turbo lights. i think i may run it back up 2 turns (where it was stock) or even a turn or 2 higher. might do something for the "lack of power" feeling while the turbo's spooling. and will probably clean up the smoke. the guys at M&H recommend the M2 pin for towing. the M3 would probably do just fine as well.

 

I have an m3 in my stock turned up pump. Its ok but for your situation I would recommend m2. If I were tow I would want m2. I tried my buddies m5 one time for fun and holy crap!! way worse. So m3 is good, but for less smoke I vote m2. My custom pump has a custom pin, linear and very deep cut with lots of travel, thus lots of control over fuel and a stiff afc spring. Helps out a lot with smoke.