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ECU reset with a new muffler?

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Old 04-16-2004, 06:52 PM
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ECU reset with a new muffler?

I just got the stock muffler taken off today and i had a magnaflow straight through design installed, should i reset the ecu ? i haven't noticed any more power just a real nice sound.
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Old 04-16-2004, 06:55 PM
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There shouldn't be any real need to if you just replaced the muffler. But in case you do want to, it's easy: just unplug the negative terminal on your car battery for a few seconds, then fire your baby back up (you know it's been reset when your radio station settings disappear).
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Old 04-16-2004, 09:18 PM
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ok thanks man
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Old 04-17-2004, 08:27 PM
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yeah, your susposed to let the system drain by pumping the brake pedal a few times to discharge the system so the ECU looses all power and resets its self. you dont really need to do it if you just changed the muffler. when you get some intercooler hoses or an up pipe it would be a good idea to reset it.

BTW, dont listen to Choku Dori about the reset procedure, hes a n00b. (J/K! love ya man)
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Old 04-17-2004, 10:35 PM
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bout for a catback?
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Old 04-17-2004, 11:33 PM
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there are a few threads that completley describe the process. they range form just disconecting the battery to a series of steps when you reconnect it. some say you that when you re connect the batter you have to start the engine but do not press the gas pedal. let the car idle and warm up until the fan turns on. right after the fan starts turn the car off. then it is fully reset.
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Old 04-18-2004, 05:21 PM
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escaflowne -- yes, you DO need to reset the ECU for a catback.
Don -- you suck, hurry up and make it out to meet so we can talk Japan
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Old 04-22-2004, 07:30 AM
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i just leave my dome light on due to my driver's door being opened. that's plenty of current draw to deplete stored electrical charge in the system while i remove the battery terminal.

it's always safer to disconnect the negative terminal, since if you brush another part of the engine/chassis with the wrench you won't get a dangerous short.

jm2c
ken
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Old 04-22-2004, 09:40 PM
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Disconnect the negetive terminal and then press the brake for about 5 seconds. It will delete all preset radio stations and the milage thingy(forget whats its called-you push the button and it gets added tot he total milage)....theres absolutely no need to do it for just a muffler.
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Old 04-22-2004, 11:13 PM
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Originally posted by Choku Dori

Don -- you suck, hurry up and make it out to meet so we can talk Japan
im coming out tommrow night. PROMISE!!! btw: JAPAN ROCKS!

yes, i would reset the ECU when you get a cat back.
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Old 04-23-2004, 01:07 PM
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Originally posted by awns729
Disconnect the negetive terminal and then press the brake for about 5 seconds. It will delete all preset radio stations and the milage thingy(forget whats its called-you push the button and it gets added tot he total milage)....theres absolutely no need to do it for just a muffler.
I did it after I put on a cat-back and IC hoses and didn't lose my radio stations (which was a surprise), just the trip-o-meter. Well, and the ECU settings
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Old 04-23-2004, 05:17 PM
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Originally posted by Choku Dori
escaflowne -- yes, you DO need to reset the ECU for a catback.
why? the ecu will relearn after awile either way.
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Old 04-24-2004, 04:06 PM
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^^^
It's not worth the risk and hassle of CEL, and reteaching the ECU fresh after a reset is more effective using either the Shiv technique or the aggressive driving technique, than by waiting for it to adjust on its own (possibly not as effectively)
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