Clearing codes b/4 racing
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
Clearing codes b/4 racing
I just had a thought, maybe some of you are already doing this. In an effort to rid the ECM of its memory of city/highway/everyday driving would clearing the codes(disconnecting the neg. terminal on the battery for a bit)before racing improve your times?
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: Clearing codes b/4 racing (chucks88)
If you clear the ecu (reset the fuse or the batt terminal) for more than 20 seconds, you are also clearing the stored, learned driving settings an ecu gathers over the period of driving after a reset.. If you clear it and race right away, IMO it is going to run not as well as if you wouldn't. The car is basically re-learning the engine parameters and combinations for optimum running. I'd say 'NAY' on this one... :chevy
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
Re: Clearing codes b/4 racing (MrNuke)
If you clear the ecu (reset the fuse or the batt terminal) for more than 20 seconds, you are also clearing the stored, learned driving settings an ecu gathers over the period of driving after a reset..
:rolleyes:
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
If you clear the ecu (reset the fuse or the batt terminal) for more than 20 seconds, you are also clearing the stored, learned driving settings an ecu gathers over the period of driving after a reset.. If you clear it and race right away, IMO it is going to run not as well as if you wouldn't. The car is basically re-learning the engine parameters and combinations for optimum running.
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
Re: (scorp508)
But in P/E the values are ignored. No fuel alterations are made like in part throttle. The ECM goes off of variables you programmed into your chip. These aren't LSx's which tune their A/F at full throttle.
[Modified by chucks88, 6:01 PM 10/9/2002]
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Team Owner
Joined: Mar 2000
Posts: 83,383
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From: Boston, MA
:rolleyes: Whatever all that means.
See how the O2 sensor is the only one ignored in WOT?
Some values associated with WOT
Who knows maybe I'm wrong, but as far as I see it it is a waste of time on an L98's ODB1 computer.
Melting Slicks
Joined: Oct 2001
Posts: 2,075
Likes: 0
From: Central NJ
Re: (chucks88)
On a C5 or toher OBDII vehicle, it would make a difference if you reset your LTFTs back to zero but only if your tune was way off and you were combating the computer's "learning curve".
Melting Slicks
Joined: Oct 2000
Posts: 2,524
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From: Stamford CT.
Re: (NJVetteGuy)
If you clear the learned memory it will at least give you the same parameters at launch to full throtle. It may not be faster and possiblely slower, but more consistant for bracket raceing is a plus for some. You decide. Ric