RPM's go down

[DylanBeatz 10+ year member]

My car used to have voltage problems. It went from 13.8 volts down to 11.9 volts. And my RPM's at idle went from about 900 down to 600. Yesterday I put my Kinetic HC800 in the trunk. Now the voltage goes from 13.9 volts only down to 13.5 volts. So that's fixed. But the RPM's still go down. Why is this? And is it bad? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Here's a video I took of the RPM's going down.

Click to read more...

 

[infamous_e46 5,000+ posts]

Ur alt blows

 

[snb778 5,000+ posts]

never seen that before

 

[alvitae 10+ year member]

Alternator. Ever notice jumping off another car When you hook up to the dead battery the car with the good battery will idle down? Same thing.

 

[DylanBeatz 10+ year member]

Well it's a stock alt but it's 130 amps. So it is the alternator though? And there's not really anything bad about that right?

 

[adas Pro Seller]

yeah...pretty sure its just the alternator with a full load on it, loads down the engine and since you have a little 4 banger it puts more stress on it

 

[DylanBeatz 10+ year member]

yeah...pretty sure its just the alternator with a full load on it, loads down the engine and since you have a little 4 banger it puts more stress on it

it's a v6