I apoligize I haven't had adequate time to search the forums yet, but heres my problems. (90' n/a 2+2)

The car makes a winding electric type sound whenever the car is in 2nd and
4th. The sound can't be heard from the outside of the car very well(unless it just gets drowned out), but when the windows are up you can hear it over plain as day. I can feel something that might me loose in 2nd and 4th in conjuction with the sound through the gas pedal. I just bought the car 3 weeks ago and it started after a trip down the highway. What/where should I look to correct this problem.

Also the car idles rough and the power level wants to occasionally dip low where it feels like the car wants to die. I got a tune up and used some fuel injector cleaner and the problem remains. Any information would help!
Thanks
Tom

 

ohm test the injectors.

what plugs were used in the tune up? the z only runs right with the oem nissan plugs.

i dont know about that sound.

 

as well as

http://www.ttzd.com/tech/diagnostictech.html

 

The whining is likely the syncros in your transmission.

 

Thanks Dom and Zlover. I believe I have cornered the problem with the idle and fuel injectors. Apparently this is a common problem. Also I'm gonna have a mechanic check the syncros for me...hopefully this isn't too costly of a repair. Thanks again!

 

replacing the trans, if thats the case, isnt that hard if youre mechanically inclined.

 

And just so you know, if you don't retrofit the new style pintle-less injectors, your improved idle will be short-lived. The pintle injectors that came in your 1990 Z32 are not designed to work with ethanol fuel, and will continue failing thanks to our government requiring ethanol-blended fuels.