No spark...

[tamo3]

It's been long time. Finally I got some spare time while Xmas holidays and I was working on ignition.

My 280z is '75 none CA model. I can't get spark.

 

I unplug spark plug and wire and leave it near strut mount top and turn on key to ignition position. The starter motor is clanking, but no spark. Where should I check?

 

I have several modification on wiring. I removed SHUNT and directly connect the line Red/White and White line.

I removed External Voltage regulator and install CS-144 Alternator. But I don't think this is related.

I check fuse, all looks good.

I replaced fuel pump and fuel pump is working fine.

 

I try to connect MSD 6AL, too. (following instruction from here: http://www.zcar.com/forum/10-70-83-tech-discussion-forum/21909-msd-6al-ignition-77-280z.html)

Red 12ga wire to Battery Positive

Black 12ga wire to Battery Negative

Orage 16ga wire to MSD Blaster 2 coil Positive

Black 16ga wire to MSD Blaster 2 coil Negative

Red 16ga wire to Black/White on ballast

White 16ga wire to one of the terminal block wire that connected to distributor. I don't know this is right way to connect white wire..

But still no spark when I turn key to ignition position.

This was wrong wire connection for the red 16ga wire. It should connect to left side Black/White wire instead.

 

One wire was disconnected in engine room... I don't know where it was connected...

Does anyone has a clue? Any help is appreciated!

Regards,

tamo3 

Edited January 4, 2016 by tamo3

[tamo3]

I got help @ Hybrid Z. Basically, MSD 6AL does not work with fuel injection 280z. The timing of firing does not work well. 

After long search of root cause of my engine problem, finally, I found root causes. It's simple, but the problem was hidden....

 

 

 

I just forgot...

 

 

Finally, engine runs!

 

 

[tamo3]

The disconnected red wire was Water Temp Switch wire.

After research, it's not MUST Have thing.

 

Thanks ZedHead again!