TAC Tech => Electrical => Topic started by: DeVilliers on March 26, 2021, 01:48:44 PM

Title: 79 not starting
Post by: DeVilliers on March 26, 2021, 01:48:44 PM

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

Title: Re: 79 not starting
Post by: Jack on March 26, 2021, 05:56:42 PM

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.

Title: Re: 79 not starting
Post by: DeVilliers on March 29, 2021, 01:40:46 AM

Thanks Jack!

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