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Resetting ECM? How to do it? by Nate16
Started on: 10-11-2007 09:43 PM
Replies: 7
Last post by: Hank is Here on 10-11-2007 10:37 PM
Nate16
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Report this Post10-11-2007 09:43 PM Click Here to See the Profile for Nate16Send a Private Message to Nate16Direct Link to This Post
Ok I believe I just fixed a vacumn leak on my fiero and I want to reset the ecm so the code dissapears. Do I disconnect the negative battery cable and drive it at 35+ mph for like 5 mins. Should I WArm the car to operating temperature before driving it?
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Dodgerunner
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Report this Post10-11-2007 09:52 PM Click Here to See the Profile for DodgerunnerClick Here to visit Dodgerunner's HomePageClick Here to Email DodgerunnerSend a Private Message to DodgerunnerDirect Link to This Post
Just pull the battery or even easier just pull the ecm fuse for a couple min.

Then just drive it.
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Rodrv6
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Report this Post10-11-2007 09:52 PM Click Here to See the Profile for Rodrv6Click Here to Email Rodrv6Send a Private Message to Rodrv6Direct Link to This Post
You can disconnect the battery (negative terminal) for about 30 seconds, reconnect it and drive the car normally. The ECM will "relearn" idle and other parameters as you drive.
There is also a single wire connector on the passenger side between the battery and the suspension strut mount. It comes out of the harness, through the connector, and back into the harness. Disconnecting this wire will also clear the ECM memory, but will preserve your radio presets and clock. Unhook it for 30 seconds, reconnect, and go for a drive.

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Rod Schneider, Woodstock, Ga.
"You can't have too many toys!"
1988 Fiero GT
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Nate16
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Report this Post10-11-2007 09:54 PM Click Here to See the Profile for Nate16Send a Private Message to Nate16Direct Link to This Post
Thanks guys.
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Nate16
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Report this Post10-11-2007 10:07 PM Click Here to See the Profile for Nate16Send a Private Message to Nate16Direct Link to This Post
wait... so do I pull the ecm fuse while the car is running and then drive it or do I pull the negative battery cable and drive the car and it should reset right. What I am trying to say is do I run the car while the negative is disconnected?
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Dodgerunner
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Report this Post10-11-2007 10:08 PM Click Here to See the Profile for DodgerunnerClick Here to visit Dodgerunner's HomePageClick Here to Email DodgerunnerSend a Private Message to DodgerunnerDirect Link to This Post
No just kill the power setting nice and snug in the garge or where ever, then repower and drive.
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Nate16
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Report this Post10-11-2007 10:18 PM Click Here to See the Profile for Nate16Send a Private Message to Nate16Direct Link to This Post
oh ok I was confused there for a second.
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Hank is Here
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Report this Post10-11-2007 10:37 PM Click Here to See the Profile for Hank is HereClick Here to Email Hank is HereSend a Private Message to Hank is HereDirect Link to This Post
 
quote
Originally posted by Nate16:

or do I pull the negative battery cable and drive the car


You must be a magician driving you car without the negative cable

[This message has been edited by Hank is Here (edited 10-11-2007).]

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