12v WHILE CRANKING source.

[datzenmike]

This. 9v seems a little low for cranking.

[banzai510(hainz)]

When measuring  the 12volts it’s with out cranking the starter(No Starter Engaged.

so when turn key to Start you will get 12volt on the starter Yellow wire and the black blue/blackgreen wire at the same time

 

if your cranking the starter it’s going to load down below 12 Bolts across all circuits.Adding relays is not going to help.Yes even to 9volts 8 volts if you have a low cranking amp battery Circuit is in parallel to the battery

[510revisited]

5 hours ago, john510 said:

No you're not measuring wrong.What is it you have to have 12 volts for while cranking the starter ? A brand new battery won't show 12 volts when you hit the starter.That's normal.

Holley sniper efi. 2 barrel. 

[510revisited]

3 hours ago, datzenmike said:

This. 9v seems a little low for cranking.

It does to me too. I'm gonna have the battery load tested tomorrow. It's new. Not even a year... but hasn't been used, or maintained for 6 months. 

[banzai510(hainz)]

How about go to another car and test this.

 

Believe me it can drop to 9 Volts for a split second.Your focusing today much on this. Stop!!!!!!!!!!!!!!!!!!!!!!!

 

when motor runs everything will be 14volts. Hope this won’t cause a issue either,This is normal!!!!!!!!!!

[510revisited]

The forum on Facebook for these kits mentions if the touch screen cuts out while cranking, it's not getting the power it needs. I hooked the signal wire straight to the battery and still got nothing

[banzai510(hainz)]

 Fax How about go to another car and test this.

 

Believe me it can drop to 9 Volts for a split second.Your focusing today much on this. Stop!!!!!!!!!!!!!!!!!!!!!!!

 

when motor runs everything will be 14volts. Hope this won’t cause a issue either,This is normal!!!!!!!!!!

[banzai510(hainz)]

Double check for good grounds

[510revisited]

Ok. I'm back at it. This time I wired some connections onto the wires, instead of doing the high school twist!! Refresher, for those who didn't follow. I'm installing a holley sniper efi, and 123 ignition bluetooth controlled distributor at the same time. Cant get the car to fire.

 

Here is the strange thing. I have discovered I have spark at the plug. BUT only when I hold it a small fraction of an inch away from my strut tower bolts. If I hold the plugs threads against the bolts/nuts, I get no spark.. I do think maybe I should ground the block to the car better. Maybe. And I'm almost positive my one year new battery is doa... she doesn't crank very well. And doesn't hold a charge above 12.5 ish. I'm gonna let her marinate for a while, go back and give it a shot again. But until then, any ideas about the spark??

[datzenmike]

 

 

Batteries (at rest) are fully charged at 12.65 - ish, depends on the outside temperatures.

 

Ground. Engine and body need to be grounded. Distributor needs to be well grounded to the engine. Never heard of a 123 before but follow the recommendations. Does it need a special coil? a ballast?

 

Poor cranking on a new battery can easily be a dirty battery posts or cable ends. The ground cable should be bolted to the head behind the fuel pump. Is there paint on the head surface? Positive cable to the starter lug. Make sure they are clean and tight.