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close loop timing vs open loop timing

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Old Aug 29, 2009 | 09:23 PM
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From: mnt vernon ny
close loop timing vs open loop timing

i was looking over some logs and im puzzled none of the closed loop stuff seem to follow the timing maps.... light cruise i will see some time 40-45* of timing... when my map says no more than 38*. and when i go wot it follows it exactly... idk... does the ecu advance timing in closed loop if it sees fit?
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Old Aug 29, 2009 | 09:34 PM
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Egr
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Old Aug 29, 2009 | 09:39 PM
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From: Hayward
Originally Posted by hediki12
i was looking over some logs and im puzzled none of the closed loop stuff seem to follow the timing maps.... light cruise i will see some time 40-45* of timing... when my map says no more than 38*. and when i go wot it follows it exactly... idk... does the ecu advance timing in closed loop if it sees fit?
EGR advance map
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Old Aug 29, 2009 | 09:42 PM
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From: mnt vernon ny




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Old Aug 29, 2009 | 09:43 PM
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From: mnt vernon ny
hmmm egr advance map. ill look at it now. thanx.
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Old Aug 29, 2009 | 10:02 PM
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ok i tried searching on it and im not quite sure of its purpose can some one elaborate a bit?
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Old Aug 29, 2009 | 10:16 PM
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From: mnt vernon ny
ok i think i found a fix https://www.evolutionm.net/forums/ec...your-maps.html
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Old Aug 29, 2009 | 10:18 PM
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that will only subtract timing from your ignition map, not add it in

EGR adds timing.

google EGR to understand what it is first
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Old Aug 30, 2009 | 03:02 PM
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From: mnt vernon ny
Originally Posted by tephra
that will only subtract timing from your ignition map, not add it in

EGR adds timing.

google EGR to understand what it is first
ok will do, but i mean i kinda want it to subtract timing. because it just seems to keep ramping it up and then i get knock when the conditions change . i knock a drastic change will cause knock so it my ecu is raping up the timing now that i add a little more throttle the timing change is too agressive. like from 46* to 26* in less than 1k and 20 load.... i mean does that make sence?
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Old Aug 30, 2009 | 03:08 PM
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You can disable the EGR advance through the periphery bits. I wouldn't do it unless you disable the EGR valve functions/checks as well.

Depending on the RPM range and engine load you experience the problem, you may just be getting "phantom knock."

Probably has nothing to do with the higher advance. It's pretty hard to get a low compression motor to detonate without high engine loads.
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Old Aug 30, 2009 | 03:48 PM
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From: mnt vernon ny
Originally Posted by 03whitegsr
You can disable the EGR advance through the periphery bits. I wouldn't do it unless you disable the EGR valve functions/checks as well.

Depending on the RPM range and engine load you experience the problem, you may just be getting "phantom knock."

Probably has nothing to do with the higher advance. It's pretty hard to get a low compression motor to detonate without high engine loads.
kool thanks can you show me a link on how to disable the egr? im searching like hell now and most of the stuff im getting is egr plate / removal. and blah blah blah.
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Old Aug 30, 2009 | 03:54 PM
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From: Hayward
You can just put zeros in the EGR advance table
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