Only one ground wire nearly melted

[b14 se-rious]

Hey guys whats up, I have a sr20 in my 77 z. I am using a haltech e8, I built the entire harness from scratch and everything is correct and working.

I am having one issue.

That one ground wire that sticks out of the coil harness, that gets grounded on the back of the head.

What I did, Is I ran an extra 10 gauge ground wire from the battery - directly to that ground as well on the back of the head.

I added that wire to make sure the coil harness was grounded well. However, that extra wire that runs from the battery to the back of the head, is getting hot very quickly while cranking. Almost sure if the car holds idle for few minutes the wire will be completely melted.

Any ideas?

[nismoman]

Do you have a large ground wire on the block down under the intake manifold?

[modulation]

Any ideas?

You can get power "from" the battery, but grounds should go through the chassis.

Normally engines have several grounds. They have low current grounds for sensors and fuel injectors, and then large ones since the ignition voltage is grounded through the block (spark plugs) to the chassis.

Sounds like you have high current (from spark plugs) going over a engine ground only meant for low current.

I'd go from the block to the chassis.

[b14 se-rious]

problem solved. Had a ground wire touching a 12v wire very slightly.


Thanks for the help guys.