Liman78

I have a 95 240sx se which has 138k on a stock engine. It has white smoke coming out from tail pipe intermittently. It only comes out while I step on the gas pedal when the car is idling. No smoke when I am driving on the freeway or idling. Engine Oil and coolant are ok, never overheat, Normal temp. Performance and everything remain the same. Only the white smoke come out sometimes.

Do you guys think it is a bad head gasket? or leaking fuel injector?

Thanks