Gas coming from tail pipe and smoking
Do you have any code.
SOURCE: car is hard to start, keeps stalling, white smoke coming out of tail pipe
It sounds to me like you have a head gasket leaking. See if you can get a gauge and check each cylinder. Are you using alot of anti freeze?
SOURCE: Upon starting avalanche blue, white smoke comes
Take that truck into the dealer and have them repair it under the powertrain warranty. 2007 offered a 5 year/100,000 mile warranty.
The smoke on startup is the result of oil getting past the valves.
SOURCE: White smoke coming out of tail pipe, iddles.
These trucks, and most GM vehc. Had a problem with intake manifold gasket deterioration. Probably need to replace the intake manifold gasket. Make sure you check the oil also as usually coolant mixes with the oil also. Be careful this can cause seveer bearing damage and catastrophic engine failure. Good Luck.
SOURCE: 95 check s-10 blazer idle
An EGR that is stuck opencan very well cause the symptom you are decribing, including surging at idle and poor acceleration.
Failure of GM EGR Valves is quite rare.
A common problem on the 4.3L Vortec engines is failure of the Central Multiport Injection Assembly located between the plastic upper intake plenum and the lower intake manifold.
Sometimes failure of injector lines and/or the fuel pressure regulator (Part of the MFI Assembly) will cause fuel to spill into the upper plenum area. This can dislodge carbon deposits in the upper plenum which then get stuck in the EGR Valve and cause the symptoms that you are describing. The EGR Valve can be removed and cleaned. Replacement is not usually necessary.
Ido recommend replacement of the injector assembly however.
check out this solution page for more info regarding this.
http://www.fixya.com/cars/t3218505-misfire_code_rough_idle_full_tune_up
SOURCE: My 2002 chevy 6.6 duramax has white smoke coming
the early duramax engines have a problem with cracked injectors, that would be the first thing to check. also keep an eye on your coolant level, could be a head gasket. check the oil for signs of coolant in the oil.
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