my car an 03 TL stock no engine mods just intake resinator delete mod done. was taking along time to start it sounded like the engine was having issues delivering the fuel to the pistons not a battery issue but today when i got home i tried to start my car up again and it was clear the battery was dead. my car is my DD and is left outside allnight and day it has been around -10 to 30 degrees the past few days and has been snowing very heavily. my check engine light has also been on for a while all the codes were random misfires on almost every cylinder dont remember the exact code though. im wondering if it is indeed my battery or the possibly the inectors or coil packs or any fueling component in the car. if anyone can help its much appreciated



..........oh btw the lights can still turn on the stereo still works and my keyless entry and siren also work though some delay on the keyless entry. idk if that helps any though

 

Battery

 

thank you should i get a new battery? as this one is fairly old and the weather up here in Cleveland only gets worse and colder

 

Have it load tested to be sure but i would recommend a new battery. Especially if its old.

 

went to autozone got it load tested and i had to replace it.