[BCBlues]

I have an 86 GN. Under the hood it is stock. The suspension is slammed and set up for canyon racing.

I am the origional owner (bought it new)

This car is a daily driver with 80K miles.

Over the years I have replaced all of the sensors, transmission, brake pump and related power boost parts.

My current problem has me stumped. This car has always run great.

When you gas it and get any boost over 3-5 psi it coughs, stumbles, and blows out a black cloud of smoke.

It started doing this suddenly and is showing no trouble codes.

I have checked all electrical connections, sensors, vacume lines. All are in good shape.

In the past when the car has done this it was always due to broken vacume lines to the turbo waste gate.

Suspect the waste gate or turbo has died.