Injector wires

[MC75Z]

The injector wires on my 77 are unhooked and unmarked. How do I know which go where other than guessing.

[sblake01]

That's a good question. I learned years ago from a friend who owns a Z shop to mark the connectors 1-6. I can tell you which wires go to each connector. 1 (37-15), 2 (38-33), 3 (40-32), 4 (41-14), 5 (55-30), and 6 (56-31). Those numbers correspond with the ECU connector.

[zcarnut]

The injector wires on my 77 are unhooked and unmarked. How do I know which go where other than guessing.

It does not matter. The early Z cars used "batch firing" which means that all the injectors open and close together at the same time.

[sblake01]

It does not matter. The early Z cars used "batch firing" which means that all the injectors open and close together at the same time.

You know, you're right. It's been a while since I did anything with the injectors other than chaning the connectors. Too late to edit my previous and useless post.

[MC75Z]

Thanks ZCARNUT and sblake01 for the info on the injector wires. MC75Z

[YellowFever]

The injector wires on my 77 are unhooked and unmarked. How do I know which go where other than guessing.

Look very closely at the covering on the wires... my '76 had VERY FAINT factory markings near each injector connector. It looked like they once had gold lettering... but after 30 years it was barely visible.

[TomoHawk]

You can trace the injector wires through the ECU connector inside the car. I think you could use a small battery & test light to do that.

[sblake01]

But, like Steve (zcarnut) said, it doesn't matter which one goes where. It doesn't even matter on the idividual connectors if you switch the two wires. I did the BMW connector upgrade on my Z today as I did on the 810 about 2 years ago. Just for drill, I intentionally mixed up the wires and it made no difference.

[TomoHawk]

I was answering the initial question.

Do you have any information on the BMW injector connector upgrade?

thx

[sblake01]

http://www.atlanticz.ca/zclub/techtips/injectors/connectors/index.html

[hls30.com]

But, like Steve (zcarnut) said, it doesn't matter which one goes where. It doesn't even matter on the idividual connectors if you switch the two wires. I did the BMW connector upgrade on my Z today as I did on the 810 about 2 years ago. Just for drill, I intentionally mixed up the wires and it made no difference.

Your Z knows:finger: ...hope she doesn't take it the wrong way:eek: .

WIll

[sblake01]

Well, after testing it that way, I did put them back in their original order.