either have the turbo unit rebuilt, or buy a new one.
Look on the exhaust system for the turbo unit.
if the turbo isn't working its blown. dummy.
i am pretty sure the sr5 v6 never came with a turbo on any 4runner v6 so if you have a turbo v6 then i am pretty sure your motor would crap out.
The oil sending unit is located on the top of the turbo on the 94 turbo diesel 7.3
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Not if the engine is running. The turbo is powered by exhaust gasses.
buy a new turbo and replace it
Turbo position is on the right front next to the p/steering pump if your A4 is a turbo unit if not it mite be a A4 L only no turbo specification. You can not install turbo because the piston are different from the turbo engine.
If you have bubbles coming from your return lines your unit is working.
there is no speedo cable so if your speedo isn't working you either have a faulty sending unit or the dash half of it is bad
if you don't know this, you shouldn't drive an rx7...look at the engine...do you see a turbo???