Cranking issues

[Gsal]

I have a 2014 High Country and at times when I try to start it it cranks about 6 times before starting and sometimes it shoots small amounts of white smoke. Does any one know if this is normal? Also the exhaust pipe has black residue.

[stereojnky]

Generally speaking, white smoke usually means there's water present where it shouldn't be.

 

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[Dnt]

Condensation inside the tailpipe under humid conditions is normal and will make small amounts of white smoke. These DI engines will have a longer crank time than a normally aspirated engine especially in cold weather conditions. I found on my 2014 that it was most noticeable when running the E85 fuel it seemed to make for a much longer crank time consistently. never failed to start but it is a bit disconcerting to turn the key release and the silly thing is still whipping over like a eggbeater for several seconds trying to start LOL

[Trucko20]

My truck, when cranking, sometimes makes a high-pitched whining sound. Never fails to start, but it sounds strange. I was told that this is normal for these trucks, though?

[jagabom (Esquire)]

How long will the truck auto crank before it stops when the engine won't start?

Jim

[Silvern Sentry]

Generally speaking, white smoke usually means there's water present where it shouldn't be.

 

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Antifreeze most likely yup. Have it checked ASAP OP, it should most certainly not being doing that. Black residue is normal that is just carbon and really will not hurt.

[redwngr]

Extended Cold Crank with Direct Injected Engines

February 20, 2014

The 4.3L, 5.3L, and 6.2L (RPOs LV3, L83, L86 and LT1) direct injected (DI) engines (Fig. 14) available on some 2014-2015 Corvette, Silverado 1500, Suburban, Tahoe, Sierra 1500 and Yukon models may have an extended or long crank time during cold ambient air temperatures.

 

Fig 14

 

Direct Injection engines may have slightly longer cold crank times than that of port fuel injected engines. Direct Injection systems run at higher pressures and the mechanical pump on the engine must build up the required pressure before the first injection event occurs.

 

Following are typical DI engine crank times using gasoline:

 

 

If the temperature is below -22°F (-30°C), the recommendation is to perform an assisted start (such as with the use of a block heater).

 

For ethanol fuel, see #PIP5174: Extended Engine Crank Times When Using E85

 

– Thanks to Richard Renshaw