white smoke

[ranchand]

i have a 2001 duramax with 229,000 miles on it. The last few days i have been seeing white smoke coming out of my tail pipe when idling, and when i goose the motor, alot of smoke comes out, does not smoke at startup in the morning. Just seems to happen when the motor is warm. I can not tell if it is smokeing going down the highway or not.

 

[LB7 Lover 1994]

Does the truck seem weaker than usual and how responsive is it? When my injectors went bad I had a decent amount of white smoke, very little power, and she was reluctant to move anywhere.

I would bet it's the injectors and if you've made it 230,000 miles on an original set your lucky for an LB7

 

[MACKIN]

That is the place to start, checking your balance rates.

 

[ranchand]

The truck runs great, it just white or blue smoke when idling, should i run some kind of good cleaner through it? It had new injector pump back when i first got it , dealer replaced it.

 

[flyinelvis11]

Start with your injectors, find someone near you who can check them. White smoke is a good indicator for injectors or coolant getting in the cylinder such as head gasket or injector cup. Grey smoke is an indication of something mechanical inside your motor being broken

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[ranchand]

The water leavels are fine. How do they check the injectors?

 

[MACKIN]

With a TECH II or equivalent. You can try and run some GOOD NON ALCOHOL additive and yes there is A GM injector cleaner that you can try also. Try and search for it here (the part number from gm) and give it a go I would.

 

[JoshH]

99 times out of 100, an LB7 smoking at idle needs injectors.

 

[ranchand]

3100 dollars to replace all injectors, stealer want 5200 dollars. done by the guy thats works at dealer on this side.