Cold Starts

[Carterworo]

Just wondering if anybody can weigh in on my truck. When I start it in the cold(winter here in Canada) it seems to sound flooded. I bought the truck used, it has an h & s Blackmaxx tuner, and I was told it has 120 over injectors. Would oversized injectors at -20 Celsius cause this? Or should I be looking into new injectors/tuners?

 

[jws123]

Do you have your truck pluged in/block heater? or is the truck stored inside cant expect a diesel to fire up easy whe its that cold with no heater ect.

 

[Carterworo]

Oh yeah, plugged in, with block heater. Grid delete done on truck, but it’s like I’m smoking the whole neighborhood out. It’ll smoke for like 15 minutes idling to warm up abit, until I put my foot into it and drive the thing.

 

[Carterworo]

I should also state; the truck is a 2012 6.7 with a compound turbo kit, cold air intake, 120 over injectors, and the blackmaxx tuner.

 

[Burla]

It is normal to smoke when cold, I drove a rig for Rock island for ten years. Not really sure about the feeling of being flooded, you can try adding a cetane boost and see if that helps. I had driving many trucks in that time, some where worse then others, cant say why, but this is very normal but only first start when cold. I also was in the habit of adding cetane boost and other additives in my Cummins ram back in the day. At that time they were just talking about losing sulfur inn diesel, so our house mechanic told me to use that. I'm guessing cetane boost will substantially fix this.

fuel air and spark, well diesels suffer from the needed spark when cold due to the compression needed. 15 minutes sounds crazy to me, it shouldn't take that long. This is only one thing that cetane boost can fix, check it out.

 

[Carterworo]

Yeah I figured 15 minutes is crazy also. All the cold start videos online that I’ve watched are only the first few seconds. I’ll have to check out some booster.

 

[Smokeybear01]

The "winter blend" isn't helping matters either. But the cetane boost should make a difference. The over sized injectors will add some coal to a cold exhaust also. Good luck

 

[06 Dodge]

Oh yeah, plugged in, with block heater. Grid delete done on truck, but it’s like I’m smoking the whole neighborhood out. It’ll smoke for like 15 minutes idling to warm up abit, until I put my foot into it and drive the thing.

This reminds me of a semi I drove back in 85 with a Cummins NTC 350, once the temps got into sub zero range no matter what we did that SOB would bellow smoke for 10-15 minutes on cold start up, it was all stock engine except for the fuel pump was turned up 10% so I know first hand what you mean when you say ya smoke out the whole neighborhood, good luck