Does Weak Battery Affect Car Performance. If the spark is weak this tiny interval will increase and alter the timing which could reduce car performance. Battery is only use to start the car n nothing else.
Battery is only use to start the car n nothing else. I have seen a bad battery affect how a car runs especially on smaller cars. On 11282011 at 138 AM Cdior said.
There are several myths about the car battery that the life of the battery increases with the kilometres you drive.
The alternator and other parts of the car are affected by a weak battery. So I doubt whether the battery is the culprit. Saying this I have driven 200kms with a dead alternator and dead battery and my performance and mpg were not affected. And to power your ECU which indirectly owns the map of the transmission.
