Sending unit outputs

[Josh Moline]

I have a 1981 280zx and I think I have the sending unit plumbed correctly. But I don't think I'm getting fuel still. The right most line is the vent line. The middle is the send line and the left most is the return right??

[Zed Head]

Whose left?  Can't get it right until you know whose left.

[Josh Moline]

32 minutes ago, Zed Head said:

Whose left?  Can't get it right until you know whose left.

That picture says it all. The it would be your left if you are standing behind the car looking down at the unit. Thanks a bunch!

[Zed Head]

Does it solve your no fuel problem?   You know that the pump only runs when the key is at Start or the engine is running, right?  Some ZX's have a 5 second prime when the key is turned on but it's often broken.

[Josh Moline]

1 hour ago, Zed Head said:

Does it solve your no fuel problem?   You know that the pump only runs when the key is at Start or the engine is running, right?  Some ZX's have a 5 second prime when the key is turned on but it's often broken.

I'm gonna have to go back tomorrow and mess with it more. But I don't think the prime works. Is there another way I can prime it? 

[Zed Head]

Pull the wire off of your oil pressure sender and alternator and turn the key on.  The pump should get power.

The FSM and the EFI Book 1980 have more about how things work.

https://www.classiczcars.com/files/category/14-280zx/

https://www.classiczcars.com/files/category/4-manuals/