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Air Temp Fuel Tables?

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Old Mar 1, 2017, 07:45 AM   #1
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Air Temp Fuel Tables?

I have been all over trying to figure out which table in tephra v7 will compensate for colder temps. I have tried searching before making this thread because i didnt want to be a bother but i am running SD omni 4 Bar MAP and have turned off o2 sensor feedback. I am fine when its warm but once the temp outside changes alot i get different afrs. Ex. air temp 68 at 15.1 afr at idle than at air temp 45 14.0 afr. Any help would be greatly appreciated.

EDIT: Running 88591715, GM IAT sensor installed on ETS piping

Last edited by Simon Pugmire; Mar 1, 2017 at 08:32 AM.
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Old Mar 2, 2017, 12:18 PM   #2
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Quote:
Originally Posted by Simon Pugmire View Post
I have been all over trying to figure out which table in tephra v7 will compensate for colder temps. I have tried searching before making this thread because i didnt want to be a bother but i am running SD omni 4 Bar MAP and have turned off o2 sensor feedback. I am fine when its warm but once the temp outside changes alot i get different afrs. Ex. air temp 68 at 15.1 afr at idle than at air temp 45 14.0 afr. Any help would be greatly appreciated.

EDIT: Running 88591715, GM IAT sensor installed on ETS piping
Works for open loop too:

<table name="Intake Air Temp Fuel Correction" address="30FE" category="Closed-Loop Control" type="2D" scaling="CF128">
<table name="Intake Air Temp" address="714A" type="Y Axis" elements="8" scaling="TEMP"/>
</table>
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Old Mar 2, 2017, 07:28 PM   #3
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so what is with the HUGE numbers? lol did i miss something?

Last edited by Simon Pugmire; Mar 2, 2017 at 07:46 PM.
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Old Mar 2, 2017, 10:36 PM   #4
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Air temp should be taken from the manifold .......that's how all factory SD setups work.

With a closed throttle, as in low load, the air pressure drops across the butterfly, the temp drops too.
That's the only way you get the correct air mass calculation.

Software changes can't fix broken hardware.




The latest MAP sensors have the air temp sensor built in.........4 pins?.....or is it 6?
Or 5?


Some clever person will know.

Last edited by RightSaid fred; Mar 3, 2017 at 05:38 AM.
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