I've had this 71 datsun 240z for a few weeks. one day it just stopped running(it was a barn find btw). I checked the electronics. they looked pretty good. I replaced the plug wires, the sparkplugs, the condenser, the distributor, the points adn the coil( i routed a wire around the ballast resistor because the new coil produces sufficient ohms). after all this still no spark. I've started testing continuity and so far its turned out good but i still dont know where to put the ends of the ammeter thing when testing the tach to where the blue/white wire leaves the cabin.

The compression is good in the engine and sufficient fuel. so i'm really at a loss as to what to do. any suggestions as to whats wrong?

Never mind.

Edited March 31, 201411 yr by Zed Head

If you took the ballast resistor out of the circuit the car won't run (ask me how I know). Connect the two wires from the b-r together and see what happens. It would also make a great anti-theft device, because no one would look for it there.

Cheers, Mike

I tried with both configurations of the ballast resistor. Nothing changed. Still the same problem of no spark to the sparkplugs.

After checking continuity I found that the wire leading to the tach to the wire right before it leaves the interior cabin isn't continuous. Is there a relay in between those or does this test conclude that there's a break in the wire somewhere in between or the tach is somehow messing things up?

Just an update. when i test the wire going into the tach and the wire coming out of the tach the ammeter says it isn't continuous. Is the tach busted? and is there anyway to bypass it at that so i could isolate the problem there

I think that your user name is putting people off.

Edited. Removed some words.

Edited April 2, 201411 yr by Zed Head
Too blunt

you win zed head

I'm new to the z thing too and i've been having similar problems-as 2 not start a new thread does anyone have a solution for this( id ont want to stat a new thread for this if it can be answered here)

A good place to start is the FSM. You can download it here: XenonS30

Follow the steps in the section EE (Engine Electrical section)

Chas