On-board computer chip

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Mar 21, 2000 | 01:53 AM

t_clark

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Joined: Mar 2000

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On-board computer chip

If your battery was disconnected would that reset the on-board computer chip, if so, would that affect how the tranny shifts? How long does it take to re-program itself to behave prior to being reset?

Thanks,

99 expedition 5.4l

Apr 6, 2000 | 07:18 AM

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On-board computer chip

Disconnecting your battery will NOT cause your vehicle to shift any differently. The ECU in your vehicle is comparable to a PC hard drive. It remains idle when unplugge, but, does not lose any data stored in the hard drive. When repowered, the hard drive continues running the stored program. There is a file written into the Superchip to increase the fluid pressure by 20% in the tranny to improve the firmness of the shift.E-mail me for further explanation or info. ddracing@worldnet.att.net
D

Apr 6, 2000 | 05:46 PM

Phillip Guidry

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Joined: Jun 1999

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On-board computer chip

I'm not sure about the shift points, but, I usually have to clean the throttle body on every vehicle that I disconnect the battery in order for the idle pattern to be normal so I can deliver the vehicle back to the person without them complaining of an unstable idle while the computer is relearning the vehicle/driver characteristics.
Phillip