[ANOTHERLURKER]

It is possible the turbo has gone bad on you. There is a o ring for the oil line in the turbo that when it goes, will actually start pumping oil into the turbo and out of the crank case. dont drive it till you check oil level and look for smoke out the back.
if it is not a turbo car, then have the catalytic converter checked. if it is clogged it will cause the glowing manifolds and will throw a CEL(check engine light) The cat can go bad with age, mileage or a lean runnign condition which send un burned gas into the cat and when it does light, it will clog it.
It could be coils going bad.
The best thing to do is have the engine codes read at a shop or at an auto parts store, some do it for free and see whats going on in there