PAY ATTENTION TO THE WARNINGS!

Engine management light

On most modern cars, computer diagnostics will register turbocharger faults and the engine management light (EML) will illuminate. Of course, an EML doesn’t only cover turbocharger failure, which is why you’ll need to carry out further checks to see what kind of engine problem your Porsche is experiencing.

Boost gauge

Some turbocharged vehicles are fitted with a boost gauge, which lets you know how much boost your car’s turbo is producing (you can fit an aftermarket boost gauge to an older car if desired). If boost levels aren’t rising as high as they used to during normal driving conditions, there’s is a good chance your turbo is in need of repair.

Power loss

If you notice your turbocharged Porsche is accelerating slower than usual, or you find it isn’t capable of reaching the speeds it once could, this may be a sign its turbocharger is failing.

Smoking exhaust

If the turbo housing has cracked, or the internal seals have blown, oil will start to leak into your exhaust system. As this burns off, it produces a distinctive blue-grey smoke, which will become more apparent as engine revs increase and when you pull away immediately after a period of idle.

Whining

Often, a failing turbo will make a loud, distinctive noise when under boost. The sound is like that of a dentist’s drill (or police siren if the compressor wheel is damaged). If you hear this sound, it’s time to take action.