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Old 20-12-2018, 09:37   #1
adamrshaw
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Disconnecting battery - map store query

Hi all

About to put my evo 6 away for the winter and resurface it about March/April

Car is running a vipec ecu. Am I ok to disconnect the battery for a few months and then reconnect again when I am good to use

Will the map still be stored and I won't lose it?

Essentially what I am asking is it ok to disconnect battery for a couple months while I'm not using car? Any potential issues with the map or anything else if I do this?

Thanks
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Old 20-12-2018, 10:06   #2
plip1953
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It will be just fine.

The only thing you might lose is stored radio stations lol
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Old 20-12-2018, 11:51   #3
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On a VI - You will definitely have to do the 'good old' re-learn the idle speed thing when you re-connect. 10 mins running with everything off that loads, 10 mins with it all on, lights, A/C, fans, radio, et.al.
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Old 20-12-2018, 17:20   #4
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Don't worry, definitely won't lose your remap .
Took my battery off loads of time. Tuck her away and forget . She's safe .
Then look forward to spring
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Old 22-12-2018, 10:07   #5
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Quote:
Originally Posted by VI_Shooter View Post
On a VI - You will definitely have to do the 'good old' re-learn the idle speed thing when you re-connect. 10 mins running with everything off that loads, 10 mins with it all on, lights, A/C, fans, radio, et.al.
Does this apply with a Vipec ecu? I had one on my 6 and don't recall any issues at all after battery disconnections.
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Old 22-12-2018, 12:41   #6
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Quote:
Originally Posted by plip1953 View Post
Does this apply with a Vipec ecu? I had one on my 6 and don't recall any issues at all after battery disconnections.
I only know about what happens if an OEM ECU is fitted
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Old 20-03-2019, 22:45   #7
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guys, Help please...
My 7 has a drain on the battery, and after not using the car during salty weather, the battery went flat. I have now charged it up and been for a run. the car had a high idle at around 1400 rpm at the lights etc and poor engine breaking. I did the 10 min idle reset with elecs off then on and it isn't much better now. was 850 rpm before the barrery drained. Any suggestions would be massively appreciated.

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Old 21-03-2019, 07:32   #8
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we have battery isolators fitted to all our rally cars many dont move for weeks of not months with the battery isolated

weve run GEMS ,MOTEC ,and OE ecus NON have any issues with relearning anything
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Old 21-03-2019, 08:43   #9
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Quote:
Originally Posted by Pulsarlee View Post
guys, Help please...
My 7 has a drain on the battery, and after not using the car during salty weather, the battery went flat. I have now charged it up and been for a run. the car had a high idle at around 1400 rpm at the lights etc and poor engine breaking. I did the 10 min idle reset with elecs off then on and it isn't much better now. was 850 rpm before the barrery drained. Any suggestions would be massively appreciated.

Thanks
Lee
Have you checked the obvious kind of things such as whether the throttle cable might be sticking? Try fully closing the throttle butterfly where the throttle cable attaches at the right hand end of the inlet manifold. Another possibility is that the electronic throttle position sensor has developed a fault and either it believes it in a particular position when that isn't the case or it's motor is faulty - although it would seem odd, at least to me, that a fault like that would arise coincidentally with the battery having been flat for an extended period.
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Old 21-03-2019, 14:39   #10
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never heard of this 're-learn'
I take my battery out over winter (VI on standard ecu), for months at a time, come spring i change all the fluids, plugs etc, plug the battery back in and away i go.
Everything works as expected

Apart from the radio stations on my stereo need retuning
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Old 21-03-2019, 22:55   #11
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how much is a TPS for an E7 btw?
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Old 21-03-2019, 23:00   #12
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or is it more likely to be a stepper motor issue? can anyone explain the differences please?
thanks
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Old 26-03-2019, 18:39   #13
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Just as a + I forgot to say my ecu is mapped, o issue, not once ever has it reset itself.

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Old 28-03-2019, 15:54   #14
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Quote:
Originally Posted by VI_Shooter View Post
On a VI - You will definitely have to do the 'good old' re-learn the idle speed thing when you re-connect. 10 mins running with everything off that loads, 10 mins with it all on, lights, A/C, fans, radio, et.al.
Wow, I own an evo V, is it the same with my ECU?
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