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-   -   does removing the battery 'reset' the computer? (http://forums.pelicanparts.com/porsche-944-turbo-turbo-s/502040-does-removing-battery-reset-computer.html)

nynor 09-28-2009 06:02 PM
does removing the battery 'reset' the computer?
 
as the title says....

thanks,

darell

Rogue_Ant 09-28-2009 06:08 PM
On the 951? The 951 does not have a 'memory'. There is nothing to reset.


-Rogue

nynor 09-28-2009 06:53 PM
yes, on the 951. any other takers? i think rogue is correct.

still trying to sort another problem and i thought that *IF* the computer were 'reset'....

Rogue_Ant 09-28-2009 06:59 PM
I know I'm correct ;)
The DME does not have any non-volatile memory, besides the EPROM (which the DME can't change the code).

What kind of issues are you having?

nynor 09-28-2009 07:40 PM
failed emissions. high CO and high HC. which is EXACTLY the opposite of what i expected. i was expecting high NOx.

i think my air filter was plugged.

Rogue_Ant 09-28-2009 09:27 PM
How old is your O2 sensor?

nynor 09-28-2009 09:51 PM
two years, i think. at most, three years.

i pulled the k&n air filter and it was very dirty. i cleaned it and re-oiled it. back to the IM station tomorrow.

nynor 09-29-2009 03:03 PM
i checked the voltage coming from the O2 sensor: .3V at idle, dropping to .15 or so revved. i thought it was supposed to be around .8V at idle. can someone confirm?

Rogue_Ant 09-29-2009 03:04 PM
Hmm, O2 should cycle once the car is warmed-up and in closed-loop. It should cycle around .5v when in closed-loop.

Might have a bad O2.

nynor 09-29-2009 07:53 PM
yeah, i think it might be bad. i'll be replacing it tomorrow.

nynor 10-01-2009 03:05 PM
new O2 sensor reads .9V at idle and heated up. the 951 passed emissions, with significantly better numbers.

Rogue_Ant 10-01-2009 05:40 PM
Good news!


-Rogue

wild man 10-12-2009 05:56 AM
Quote:
Originally Posted by Rogue_Ant (Post 4924052)
On the 951? The 951 does not have a 'memory'. There is nothing to reset.


-Rogue
Conversely, you could say that it gets reset every time the ignition is turned off.

Rogue_Ant 10-12-2009 12:30 PM
Eh - semantics. The 951 does not have a 'fuel trim' or other resident memory feature...


-Rogue

wild man 10-12-2009 03:00 PM
Quote:
Originally Posted by Rogue_Ant (Post 4948669)
Eh - semantics. The 951 does not have a 'fuel trim' or other resident memory feature...


-Rogue
Looks like, technically speaking, you got me on that one. What can I say? - nice job!


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