Rough Idle with white smoke???

custom8726

Active member
Feb 25, 2008
2,784
0
36
Upstate N.Y
What the heck ended up happening here?

Nothing, yet:confused: I have been putting additives in every fill up since it started puffing white smoke, It so speratic I don't know what it is. Still have not got it hooked up to a tech-2, just been hoping it will fix itself:rolleyes: Sticky injector I hope.
 

custom8726

Active member
Feb 25, 2008
2,784
0
36
Upstate N.Y
oh yeah, I should mention the idle went back to normal and has not missed a beat since I started running the additives, It just will puff some white smoke for a couple seconds every so often and then it clears back up:confused:
 

backe

New member
May 25, 2010
11
0
0
42
NW New Mexico
i have both PPE and EFI. ppe does not display the info correcty... really as long as the #s are close together your mostlly in the clear.. what i think is that the maybe 3 out of your 6 hole are spraying fuel so all 8 of your injectors are slightly cloged.

if your still worryd about it you pull the #7 injector took me about 4 hours ffrom start to finish including a run to autzone. pull the fender liner and have a 17mm crows foot (best one u can afford) line wrench style. ... i dissassembld the injector nozzle then used wd40 with the red straw and only 2 out of the 6 holes would spray :( ... i found that B12 worked the best to remove the carbon.

i would post the pics but i cant figure out:confused:
 

Robbyd12

New member
Nov 27, 2017
1
0
0
2004 LLY Duramax

I have 150,000 on my LLY and it is starting to surge and smoke at idle. Was there any solution to this? I have always used an additive with my fuel.