Wiring Problem

[Sonex2000]

I just figuerd out why my car hasn't been starting.

The Harness the goes to my coil pack, only 1 of the wires is live when the car cranks. The other two don't give power when the car cranks. It gives power to the last 2 sparkplugs. For a long time I thought it was my ignitor module.

The problem now, is figuring out how far along the wire it's shorting out.

 

[turboa7mgte]

http://www.cygnusx1.net/supra/library/TSRM/ig/IG_15.html

I am going to say your ignitor is Bad..... See if you can find one and swap it in your car.
You can also test yours with the instructions with the link above.

Good luck!

 

[Sonex2000]

I was hoping it was that. But three ignitors later and still no start. I took and existing ignitor and coil pack from a working car. It did the same exact thing. first four coils were getting no juice. and only the last two were.

 

[Sonex2000]

I might have some wires crossed.

 

[Sonex2000]

Can anyone help with the N/A harness to the Turbo Harness?

 

[Supraholic]

There is single wire ground connection on the coil pack assembly.. double check..

 

[Sonex2000]

I found out that. The harness that attaches to the coil pack. there are 3 live wires and 1 ground. When the car is off 2 of the wires are giving power, and 1 is not. When the car is cranking the 2 live wires when the car is off don't give power. That's what I think is why the pack aren't getting power. Some check into that for me.

 

[gixxer750]

I can't figure out how it would be possible to fire only 5&6 with the firing order of this car..... My car would only fire the last coil pack, and it was cylinder 2&5. My problem was the ECU