car dies when battery is disconnected

alright im having no trouble with the G at the moment...lets say im gonna work on the car for whatever reason and i disconnect the battery cables...im finished with whatever i was working on and i reconnect the battery..go to start the car and it last one second then it turns off....when my car was 100% stock i never had a problem disconnecting the battery and having my car die...but ever since i installed an intake and full exhaust...my car dies...and i have to keep cracking the car untill im able to get it on the road and drive for a while...i know everytime u disconnect the battery you reset the memory on the computer...so when you reconnect the battery and turn on the car...the computer thinks everything is normal like when it came from factory....once i drive for like 45 minutes to an hour the car starts to idle fine and works properly....but i have to step on it from light to light cause if not my car will die...and i also die at every light...im guesing the computer needs time to set itself with the upgrades put into the car...i got no check engine light on or nothing...this just happens when i disconnect the battery and reset the computer...makes me worry since i plan on going boost soon and i know you cant be stepping on it without a tune and after 500 miles of break in i think...is there any way to keep the computer from resetting itself when disconnecting a battery.???

sounds like a maf sensor problem or vacuum prob.....any check engine lights?

That's because the ECU has to reset itself.

yea i know it has to reset itself...but it sucks...i feel like i killed the G :(

It sounds like you just answered your own question. You are not alone, at car shows, many owners bring a battery charger to get their Civics running so place one in the G for safe keeping.

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Originally Posted by mikedela

sounds like a maf sensor problem or vacuum prob.....any check engine lights?

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no lights...and i remember the first time i installed an intake my car died too...then 2-3 more cranks and alittle rev and back to normal...i guess it sucks to much air in than what it was used to so it dies until it can match the fuel with the amount of air going in...i guess it takes time for the ecu to set itself...

never had a problem w/ disconnecting my battery, i have an intake headers and full exhaust also with the auto there was never a problem and w/ my 5spd no problems either, i would check over the car in a few areas, the mas alternator sprk plugs wires et and go form there shouldnt do that

Every time I work on my car & I disconnect the battery I wait for about 45 min to a hour to reattach the battery cable. When I reattach the cable the factory radio will show a code ( you prolly don't have the factory radio) :lol: . Then I start the car & just let it idle for a while to get itself in check. Then I take it out & drive like a bat outta HELLL!!!!!!!! :twisted:

I kinda had a problem similar to yours, everything was fine, but sometimes my car would act up like i wasnt producing enough voltage. I replaced my alternator and battery...and i still would get the problem from time to time...found out it was my ground wire to the battery...piece of crap was falling apart. Replaced it with a heavy duty one...no problems since. hopefully yours is just that.

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Originally Posted by SkylineG1

That's because the ECU has to reset itself.

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Thats not the case. Something else is causing his issue, most likely as said its a problem with you MAF sensor.

Last time AAA had to replace my battery on a roadside the dude used a battery doodad that plugged into the cig lighter and provided the ECU with enough power as not to reset.

Don't know what it is but it can't be THAT hard to find. Let us know if you do and where. I'd like one too. :)

i just swapped out my spark plugs and wires this weekend. My car did the same thing for the first day after i did the work. Idled funny, died on my a few times.....just give it time and it will work its self out.

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Originally Posted by TexasMade

i just swapped out my spark plugs and wires this weekend. My car did the same thing for the first day after i did the work. Idled funny, died on my a few times.....just give it time and it will work its self out.

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i know..im not having a problem now...its just everytime i disconnect the battery and reset the ECU...after getting it on the road for a while everything goes back to normal until the next time i take the battery off...

Simple solution... Move the battery one last time to the trunk... so that you don't have to keep taking it out to do engine work.. imo

hahahahhaha @ the topic title.

"your car dies when you disconnect the battery?"
"yep"
"amazing!"

:lol: :lol: :lol: sorry its just funny

is there any white buildup on the battery terminals?

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Originally Posted by Serstylz2

is there any white buildup on the battery terminals?

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no i have an optima, which is a gel battery, so no corrosion happens, due to that there is no acid...and the terminals are 100% clean as u can see in this pic.


http://i19.photobucket.com/albums/b1...s/DSCN1089.jpg

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Originally Posted by Jeffylou87

Simple solution... Move the battery one last time to the trunk... so that you don't have to keep taking it out to do engine work.. imo

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true...but dont they say whenever u do engine work to disconnect atleast the negative???

Hmmm I'd only think that it would be elctrical work.... Like hooking up screens or a system....

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Originally Posted by Jeffylou87

Hmmm I'd only think that it would be elctrical work.... Like hooking up screens or a system....

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i unplug mine if im going anywhere near electrical stuff.

i live and die by two rules... 1) safety first, and 2) no fat chicks.