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Questions about interpreting LTRIM & O2 data in Atap

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Old 07-18-2003, 06:01 PM
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Default Questions about interpreting LTRIM & O2 data in Atap

1) When you look at your Ltrim data in Atap should you only look at full cells 1 thru 19? or should you also look at fuel cell 0?

2} When monitoring the O2 readings to tune at WOT do you only look at data when the TPS = 100? Or should you also make sure the fuel cell = 22?

Periodically I get TPS = 100 and fuel cell = 13 for an )2 value.

Thanks,

Jim
Old 07-18-2003, 09:25 PM
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Default Re: Questions about interpreting LTRIM & O2 data in Atap

For a general read, cells 2-19 is what I use. Only average your O2 data when TPS is 100%.

Mark
Old 07-19-2003, 10:26 AM
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Default Re: Questions about interpreting LTRIM & O2 data in Atap

Thanks!
Old 07-19-2003, 01:44 PM
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Default Re: Questions about interpreting LTRIM & O2 data in Atap

0-15 are part throttle cells.

16 is idle in park AC on
17 is idle in park AC off
18 is idle in gear AC on
19 is idle in gear AC off
20 is idle in open loop
21 is coast down
22 is wide open throttle

just my observations.
Old 07-20-2003, 02:51 AM
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Default Re: Questions about interpreting LTRIM & O2 data in Atap

0-15 are part throttle cells.

16 is idle in park AC on
17 is idle in park AC off
18 is idle in gear AC on
19 is idle in gear AC off
20 is idle in open loop
21 is coast down
22 is wide open throttle

just my observations.
Interesting. Maybe some of the cells are different for '00 and earlier cars (I know for a FACT that they are different for the earlier LS1 'vette's).

4 - 16 are the one's to monitor on a '01 or newer LS1.

18 A/C on at idle stop.
19 A/C off at idle stop.
22 still WOT though
Old 07-20-2003, 02:55 AM
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Default Re: Questions about interpreting LTRIM & O2 data in Atap


2} When monitoring the O2 readings to tune at WOT do you only look at data when the TPS = 100? Or should you also make sure the fuel cell = 22?

Jim
Both.

You can get a 22 cell reading out of 100% TPS if you're shifting an M6.




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