2009 Jeep GC Limited, quadratrack v8, backfire upon acceleration, cuts out and blows light gray/white smoke....lots of it

How does the exhaust smell when it does this? Sweet? Or like burning oil. Did the dealer ask you any of these questions? Did they check for an internal coolant leak? And are you going threw any oil. Things to pay attention to the next time it happens, Helps diagnostics.

The dealership did ask about the smell of the smoke. Since I'm always driving when this happens I can't be sure of the smell. They did check for coolant leak and found none, and I am not going through oil. They did some kind of pressure check for the gasket and said it was ok. My son who is a Ford Tech in Phoenix said it could be PCV valve since it is intermittent and seems to run fine for a few weeks after one of these big blowouts. Thank you for your answer. I will add anything else if I think it might be relevant. What's your take about the PCV?

The PCV helps the motor to breath, so it has vacuum on it from the intake manifold, I suppose if it were bad it could be sucking oil in threw the intake, it is a one way valve & normally when it goes bad it is plugged witch causes oil to be pushed out of the motor, eventually oil would be leaking, not burning. I'm not so sure to suspect a cracked head, or bad head gasket opening up with heat (expansion). At least you are having it looked at and now you have some things to aware of.

I also have a 2009 Jeep GC Limited, V-8 with the same symptoms. 135,000 miles now, but has done it occasionally for years. Good hint on the PCV, so I'll be looking into that. Otherwise great vehicle.