Can A Bad Battery Affect Idle

Can A Bad Battery Affect Idle. As powerful and indispensable as our cell phones seem, they are not invincible. Note that a weak battery can randomly knock other features offline, too, including adaptive cruise control, blind spot monitoring, and many more.

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Discussion starter · #10 · jan 22, 2005 (edited) smokingtiresv6 said: Your car battery may begin to drain for 8 reasons: Is the rough idle intermittent or consistent?

It Sounds Like You Have A Lack Of Pressure In Your System.


Can a low battery cause poor idle and rough running? Can a bad battery cause headlights to dim? Mildly rough idle during traffic stops.

Since The Ignition Coil Is Part Of Your Car's Ignition System, Any Fault Will Cause The Check Engine Light To Come On.


You really have to look at a wiring diagram for your engine to know for sure. Yes., if the battery is shit , it will effect idle and low rpm firing. The alternator depends on the battery to put out power so if the battery is dead or near dead, the alternator will be dead or near dead too.

The Age Of A Battery, Even If It Doesnt Show Any Obvious Signs Of Being Old, Can Affect Your Vehicle In Negative Ways That Will Slowly Add Up To A Big Repair Bill.


A battery will take all the current it wants and no less. If you have a faulty alternator and the vehicle battery gets low on voltage then the computer may not shift the transmission gears correctly and cause other drive symptoms like stalling or surges and rough shifts. To answer the original question, yes it can affect the operation of the ignition if combined with a bad alternator.

I Seriously Doubt A Bad Battery Will Have Anything To Do With Your Idle, It Is Most Likely Your Alternator.


As powerful and indispensable as our cell phones seem, they are not invincible. If you have any electric components in your ignition system that require 12v then your battery voltage being low definitely could cause engine problems. A battery is a pig.

More Likely The Coil Packs, But Try The Battery First.


That's why i recommend replacing it before you have problems with it. A discharged or weak battery is very hungry for current. Replace bad ignition coil (s) an ignition coil is known as a spark coil.

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