white smoke with cold start

johndeerezach · Dec 22, 2012

so now I got my starting figured out started now I am just wonderin when I start it cold it pours white smoke. I know its fuel but can anybody explain why it does it. and im pretty sure the up pipes need new gaskets. bellowed or just get gaskets? thanks for the input. also doesn't white smoke this morning but had it plugged in all night.

POWER-STRUCK · Dec 22, 2012

could have some weak glow plugs or relay, maybe bad fuel

powerSmokin · Dec 22, 2012

It sounds like a relay or gp harness issue, my sister's started doing that a while ago.

johndeerezach · Dec 23, 2012

both are new. Only does it when not plugged in cold like 20 degrees or below it seems like.

POWER-STRUCK · Dec 23, 2012

anything that can cause an incomplete burn can cause white smoke such as low compression, weak batteries, glow plugs, bad intake air heater, idm voltage, worn injectors, aggressive performance programming, but most likely just low fuel quality as we all know that since the introduction of ulsd all diesels have had adverse effects from this fuel with traces of ethanol, water, and lower cetane, lower thermal btu's

johndeerezach · Dec 23, 2012

yea i forgot i deleted the iah. so thats probably why until it gets up to temp.

Bobby@cp · Dec 23, 2012

johndeerezach said:
yea i forgot i deleted the iah. so thats probably why until it gets up to temp.

I deleted the AIH and it doesn't do that..... I get a little smoked at first cold start then after a few seconds it goes away.

Sent from the left lane with the hammer down...

POWER-STRUCK · Dec 23, 2012

keep in mind that altitude (barometric pressure) IAT sensor, and EOT sensor are inputs that control how the truck works on cold start strategy

johndeerezach · Dec 23, 2012

Well i think its heavy for about 20 seconds then lighter for about a minute.

POWER-STRUCK · Dec 23, 2012

kinda the nature of the beast, diesels ignite off of heat and compression and until the cylinder head gets temperature they will not get a complete burn

johndeerezach · Dec 23, 2012

Yea i kinda figured it was normal. but dad just got a 2013 dmax and no plug in no wait to start popped right off in 10 degree weather. He now laughs at how i have to wait and plug it in. Lol

ithumpwheniwalk · Dec 23, 2012

not to derail the op's thread.. my truck smokes pretty good on cold days until it's warmed up, used to be fine but now does it after I installed my 160's.. this is not normal? It is kinda embarrasing, but once it's warmed up it's all good. gp's and everything checked out good when injectors were replaced. Truck runs like a hot damn. It's also always started when cold on the stock position on the chip. (don't know how it acts on the other settings, i always reset it to stock when i shut it off for the night)

POWER-STRUCK · Dec 23, 2012

ithumpwheniwalk said:
not to derail the op's thread.. my truck smokes pretty good on cold days until it's warmed up, used to be fine but now does it after I installed my 160's.. this is not normal? It is kinda embarrasing, but once it's warmed up it's all good. gp's and everything checked out good when injectors were replaced. Truck runs like a hot damn. It's also always started when cold on the stock position on the chip. (don't know how it acts on the other settings, i always reset it to stock when i shut it off for the night)

programming might need the fuel pulse width trimmed to aid in cold start drivablity

yzrmbsg · Dec 24, 2012

POWER-STRUCK said:
programming might need the fuel pulse width trimmed to aid in cold start drivablity

The programmer is turned off?????

ithumpwheniwalk · Dec 24, 2012

yzrmbsg said:
The programmer is turned off?????

not turned off, just set to the "stock" position that was put on the chip.

POWER-STRUCK · Dec 24, 2012

doesn't your signature say that you have 160cc single shots? in a split shot truck? "programming might need the fuel pulse width trimmed to aid in cold start drivablity"

ithumpwheniwalk · Dec 25, 2012

POWER-STRUCK said:
doesn't your signature say that you have 160cc single shots? in a split shot truck? "programming might need the fuel pulse width trimmed to aid in cold start drivablity"

I think the tunes could be tweaked a bit, but I got the chip when I upgraded the injectors and got tunes from Cale@ BTS (now I guess Tyrant?) they were set up for these injectors. Sorry to the OP, I don't mean to hijack your thread!!

edit:

doh.. I think maybe I see what you're saying. If the stock setting truly is "stock" then yes, it could be set up for split shots. I'll have to try and start it in my tow tune maybe and see how that works. I've always been told that custom tunes usually advance the timing and it wasn't healthy to run a high hp tune on a cold truck. Any truth to that? It's the main reason I switch the chip when I shut it down for the night.