You should have more like 14 volts when the car is running. Check the output at the alternator with a DMM. If your are get under 13 volts that is a problem. Since you replaced the battery and alternator i would do a charging system voltage drop test and see if it tells you anything.

He goes over this stuff here. towards the end is the Voltage drop stuff.

I would also check to make sure the connector for the field circuit (small wires going to connector on alternator) is getting battery voltage at the alternator with the key on engine off. One wire should have pretty close to battery voltage. If it doesnt then the alternator will have a low output.

 

When I changed the alt, there was 2 wires one was a ground, one was on a connector-a 16 gauge red wire. Didn't have any play into the connector

 

you should have around 12.6 volts at the red wire with a new battery. If there is excessive resistance and it is only seeing say, for instance, 11.0 volts or something the alternator may not reach the the correct output voltage.

 

what shape is the alt belt in, they can get a glaze on em and slip when under pressure. make sure you have the right belt as well. if a little to long itll slip.

 

Auto, a short would cause voltage drop. Please check your plugs that you recently put in to make sure one isn't cracked. That would cause a short.

 

A short in the secondary ignition system would have no effect on voltage levels.

 

I did a volt test similar to the one in the video and when the engine is hot with positive needle on negative batt and negative needle on different grounds I am getting .35 to .4 mv, that equates to .035v or .0035 v? once it cools off I will test again and see what the cold engine numbers are, thanks for all the help