Mazda3Club.com : The Original Mazda3 Forum

Mazda3Club.com : The Original Mazda3 Forum (https://www.mazda3club.com/)
-   3rd Gen Protege/MazdaSpeed/P5/MP3 (https://www.mazda3club.com/3rd-gen-protege-mazdaspeed-p5-mp3-26/)
-   -   changing battery (https://www.mazda3club.com/3rd-gen-protege-mazdaspeed-p5-mp3-26/changing-battery-37789/)

paula December-20th-2004 03:51 PM

changing battery
 
Putting concern aside that I seem a silly female....I could SWEAR that I have read/heard that when you change a battery, or disconnect one, that when you reconnect it you are supposed to let the car idle a certain period to let the computers reset or something. Is that true?
Any advice on a good battery now that I'm not in Arizona but in cold Vermont and have a dead battery on my hands?
thanks
paula

FC3s Boy December-20th-2004 03:59 PM

no you can just swap it in and go, as for a good batt. in the cold i could'nt help you here since i am at the beach in my shorts today..lol - chris

paula December-20th-2004 04:07 PM

thanks for the info! I'll thaw out soon and replace it :)

macdaddyslomo December-20th-2004 04:50 PM

Actually it's heat that kills batteries..ANd as for the ECU/Battery issue...If the battery is unhooked for a certain period of time,any stored codes or "learning" it has done is erased. It is essential to do this when installing new parts like CAI's,cams,pistons,exhaust,etc,that way the ecu wont perform based on old values, rather it will learn new ones

Omron December-20th-2004 05:51 PM

yes very true, I pickup 2 mpg of fuel after a ECU reset

Borla Exhaust upgrade

paula December-20th-2004 09:21 PM

not sure i really understand ecu...
are you saying if I have the battery removed for a few hours then that can mess things up? how do you rectify it ?
exactly what is it that is "essential to do"?
thanks
p

macdaddyslomo December-20th-2004 10:53 PM

to reset the ECU by pulling power from it...you cant do ANYTHING bad by replacing a bad battery, so dont worry

Da P-Funk! December-21st-2004 06:21 AM

Yeah, ditto.

Welcome to the forum!

The ECU will 're-learn' your engine's specific parameters. One thing. I would let it 'warm up' and then drive the first time, keeping the a/c , defrost, etc. OFF, and run it kinda' hard. When i do this the car runs better (IMHO). When i last reset the ECU i had the a/c on as it 're-learned' and it didn;t seem quite as peppy...

i dunno. It couldn't hurt and it *might* help.... :cookoo:

paula December-21st-2004 09:20 AM

that makes sense to me now ...thanks for your humble opinion :)

p

Omron December-21st-2004 04:43 PM

Be advised Paula, new batterys are quite depleted so you will have to RESET THE ECU Twice,

when you start your car for the first time, your car (your charging system) will be focusing on charging the battery, so this may play havoc with proper learning values. After a day or so, Reset your battery again. and do what *Da P-Funk to ya ;)

then you should be fine


All times are GMT -5. The time now is 08:31 AM.


© 2024 MH Sub I, LLC dba Internet Brands