My car a 1987 300zx turbo 2+2 suddenly started to

Turbos are usually designed to last about 250,000km so a turbo blowing this soon is unusual. The most common reason for turbo failure are...
Poor oil supply to the bearings, faulty seals and gaskets, foreign objects in the turbo and in rare cases serious misuse of the turbo.
Turbo fan blade spin at a massively high speeds, (between 150,000 and 280,000rpm), so poor oil flow can cause the bearings to dry out and seize.
Faulty seals and gaskets can cause oil pressure to change and leaking oil into the wrong areas of the turbo. This can cause the turbo to wear out faster.
Foreign objects is simply something that has fallen or been sucked into the turbo damaging the blades or other areas of the turbo.
Misuse of a turbo is rare but not using a turbo correctly can wear them out faster. A general rule is don't just turn a turbo engine off when you park. Let the engine idle for about 10 to 15 seconds to let the turbo slow down as when idling the engine is still supplying the turbo with oil.
You may need to get a turbo specialist to look at this as soon as possible as a damaged turbo can cause damage inside the engine itself.

Is it a blow off valve from excessive turbo boost, that's normal if so!

If your oil pressure light was on, but the oil level is OK on the dipstick, it seems that the engine lost oil pressure due to a failed pump (a rare thing to happen) or a blocked filter, or sludging in the engine.

The first thing to do is replace the oil pressure sender unit with a pressure gauge, and idle the engine for a few seconds to get a reading. If it reads zero, the engine may already be damaged. That loss of power sounds like the engine was beginning to seize.
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sounds like coil pack faulty.

What does your owners manual say?

60,000 miles/36 km
75,000 miles/45 km
90,000 miles/54 km

Not more than 90,000 miles or
6 years

If it breaks,the valves get bent

Call a dealer or stop by & ask

does it vibrate at highway speeds or sitting still at idle? the highway speed vibration could be tires out of balance. the idle speed vibration could be weak engine mount or idle speed too low.

Turbo is bad, when you start seeing black exhaust turbo has gone out completely. Depending on how old the turbo is and how hard it is driven, how many miles and so forth.

turbo model? blown head gasket would be my guess, hard to start cold?

Hello
1 would service it with fluids and tires
before driving it any where.
the old fluids are contaminated

most likely the turbo, if its a darker or bluish smoke.