Low rpm at idle ****Problem***

[xXOli450Xx]

My car start normaly but when i start driving it the rpm come really low when im in neutral . The car is shaking because the rpm is close to 0! What could it be

-This problem has appeared after i install a subwoofer in my car

thank you

 

[JohnS.]

Make sure it's grounded well. How powerful of a system did you install? You may have to upgrade your alternator and/or replace your battery.

 

[mikekh10a]

Make sure it's grounded well. How powerful of a system did you install? You may have to upgrade your alternator and/or replace your battery.

X2
While you're checking the resistance of your grounds, mine as well upgrade your grounds to thicker wire to at least 4 gauge wire. This includes the battery to chassis, valve cover to chassis, and tranny/thermostat to chassis. You can always add more grounds too if you want, the more the merrier

Another way to check if your grounds are the victim is checking if any of your lights get dim when the bass hits

 

[xXOli450Xx]

i will check my ground!

my sub is 400watts rms and my amp is 500watts rms

but why its only when my car is hot ? it do that even if im not playing music!

 

[takeachance]

could be your IACV

 

[Jose1027]

I fixed my idle problem today,i cleaned my iacv,throttle body,new air filter,checked for vaccum leaks nd problem solved

Sent from my SGH-T679 using Tapatalk 2

 

[xXOli450Xx]

could be your IACV

The problem was not my sub it was my trttle body cable that was loose!

thank you everyone for your help