TAC Tech > Electrical

79 not starting

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DeVilliers:
Hi all,

Need some help please

My 79 with the 350 Chevy motor won't start. The motor swings, but there's not enough spark.
I did a few measurements. First ignition switch gives 11.5v  to the coil. When starting, the motor swings, and the voltage drops to 8v

Now I understand that there should/could be voltage drop because of the resistor wire. As I understand there should be a bypass when cranking the motor in order to get 12v.
Now I can't figure out where I missed this wire or where it's located.

What am I missing?

Thanks

Jack:
If I had to guess I would think that your wires from the battery to the starter and/or the ground wire is rusted or not making good contact. I would start at the battery and make sure your cables are good and the connection at the post is solid. Next I would check the grounds, if all checks out it should start by jumping it.

DeVilliers:
Thanks Jack!

It's alive!. Cleaned off the ground wire again and fiddled with the starter ground, retighten. Then Bam!

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