I just got bought a 93' 300zx N/A with exhaust/ intake its got 132,000 miles

Whenever im driving and drop the rpms while moving by pressing the clutch in all the way or switching to neutral, The car will idle weird, only happens sometimes more when i step on the gas a little more then usual and then drop the rpms. But the rpms will jump around between 0-1200.. It actually will turn off at any speed could be 10 mph could be 50mph, its kinda scary when your steering locks up.. It doesnt happen when the car is stoped.

Any suggestions welcome - Thanks.

 

Check for intake air leak or vacum hose loose!!Not to many z's owner here try 300zxclub.com

 

thats would I would say, intake leak or vacuum,
there are a lot of vacuum lines in that engine bay, and most of them will probably be cracked.

when it shuts off, does the motor just stall out of does the whole car loose power?
If you're loosing power, then you have a crappy ground.

 

Or stuck IACV