The other day I was driving my wife's 940 and the exhaust started to smoke, so I pulled over and checked it out. It turned out that the oil return pipe from the turbo to block seal was leaking (bad). I had the car towed home, removed the pipe and replaced the seal and gasket. That fixed that problem-stopped the leak.

Now the turbo won't pressurize according to the turbo gauge in the instrument cluster. It shows vacuum, but when I floor the car, the needle doesn't pass the mid-point to the pressure side. The car seems to drive fine otherwise, just not turbo'd.

The turbo is a Mitsubishi TD04 with the integral CBV mounted vertically. (Same as the third photo down: https://www.brickboard.com/FAQ/700-900/EngineTurboIdentification.htm )

So this is what I did when I replaced the seal:

-Disconnected the wastegate actuator rod at the wastegate shaft to get to the two bolts of the drain pipe on/off of the turbo.

-Removed and replaced the wastegate actuator to get the wastegate actuator rod back on the wastegate shaft. I didn't adjust anything with the turbo.

-Added some new vacuum hose from the intake to the turbo gauge. I didn't replace all the hose, but spliced in about two feet of it. It holds pressure/vacuum.

Not sure what I did? I'm sure I didn't put the wastegate actuator rod on the wastegate shaft wrong (the rod is on the engine side of the shaft arm).

Could it need to the wastegate actuator rod adjusted? I didn't move anything on it, but I couldn't get the rod to go back on shaft without unbolting the wastegate actuator from the housing - I would say the rod hole was off by 1/16" from the wastegate shaft arm with the actuator bolted up.

Could it be that the actuator was damaged? How can I test it?

I owned the car for about 4 years, and I would say that the car really didn't have that much turbo power. The gauge never moved more than 1/4" above the mid-point.

Should I stop driving the car?

Paul