Runs fine for about 20 minutes a huge cloud of white smoke out of the tail pipe less power and an ubnormal idle with the check engine,oil light on just for sort time but, in minutes back to normal.

Water coolant in combustion chamber , faulty gasket or cracked head , loss of coolant.

fuel injectors. they are most likely pouring fuel into the cylinders instead of spraying a fine mist.

indicates steam from combustion especially if engine or ambient temp is close to 32 F or 0 c

I thing there is the compressor wrong.If the power is changing when a smoke is coming from the tail pipe means- COMPRESSOR.Just mention - oil is also type of fuel,but coming blue smoke at the back.Worst-white smoke.That is really bat

When engines are cold you can see water vapor as "white smoke" coming out of the tail pipe. If an automatic ... you may be burning some ATF.

sounds like a blown head gasket letting coolant get injected into the engine and getting burned with the fuel. a head gasket replacement should help

oooooooooooo my friend white smoke mens head gasket is gon sorry

The intake valve guide seals are worn and are letting oil slip by under high engine vacuum--as when you let up on the gas. The only fix is to take the cylinder head off and replace the valve guide seals. This problem is pretty normal for an older car with high mileage. It will probably run just fine. Just keep checking the oil level and keep it topped up.

it is aproblem if smoke came out the pipe when engine started.

White smoke is caused by coolant or water coming out the tail pipe. There is a chance that the white smoke was caused by water splashing up from a puddle onto the exhaust pipe. Keep an eye on the coolant level in the radiator in any event. If its less then there leak coolant leak in the car engine which is causing this problem....