Fairlady 1st day to work , dead on the road

[fscruzee]

Hi everyone ,

After 20 miles of driving with headlights and heater ON ( 5:00 AM , around82 miles to work from Stockton ), suddenly RPM gauge drops to zero , while driiving at 75 mph .

Change lanes and pull over , did tried to start again and again ,engine cranks but car wont start , Have to call AAA , tow back home call the boss .

Pull out one spark plug and tried to start , did not see any spark

Please help need the car for work.

thanks

fscruzee

[evildky]

sounds like the PTU (Power Transistor Unit) it's located on the front of the passanger side cam cover, it's got all kinds of wires hard to miss, and a typical part that ewars out after 10-15 years

[fscruzee]

checked with old owner ,he replaced PTU ,in 2004 , so only 2 years ?I was thinking no current goes to PTU at all ,removed steering cover andfound electrical part of ignition key loose , checked the soldered terminalslooks good but its out on one side .I use rubber gloves and press all terminalsbehind ignition key, then started..... it runs . As soon as I released my fingerscar died/I think the contact inside that ignition key was toasted ! I ordered parts on internet , will received in three dayswill update

fscruzee

[evildky]

sounds like you solved the problem but yes the PTU gets current, unless it's hydraulic and no-one tole me ?