Idle speed adjustment not working ...
Jun 25, 2007, 07:50 AM
#1
Idle speed adjustment not working ...
I'm trying to adjust my idle speed to smooth the rough idle resulting from my engine mount install. I've made adjustments to the idle RPM drive/neutral, but the results are odd. The idle adjustment seems to have worked for the most part without the AC on, but it will randomly drop below the requested idle. A blip of the throttle will usually fix this. However, with AC on (when the adjustment is most needed), the idle seems stock (around 740 RPM).
Drive and neutral idles are set to ~860 RPM. I'd like for my idle to be around 850 RPM with AC off and probably 880-900 with AC on. Any help would be appreciated. Thanks!
EDIT ::: Tables found thanks to Gunzo!
-- These tables are for 88590015 ROM --
This is the actual idle adjustment table ...
This table sets the maximum idle value ...
Updated idle settings for AC on/off (I hope to test these today)
This table sets the desired idle with AC on/off ... (Update :: This tables does not adjust AC idle on my car. Others have said it does work.)
Other possible changes (will try to test soon as well)
Desired ISC position Neutral - 51B0
Desired ISC position Neutral AC ON - 5502
Desired ISC position Drive AC ON - 5510
Desired ISC position Neutral unknown(probably post warmup) - 3D4C
Drive and neutral idles are set to ~860 RPM. I'd like for my idle to be around 850 RPM with AC off and probably 880-900 with AC on. Any help would be appreciated. Thanks!
EDIT ::: Tables found thanks to Gunzo!
-- These tables are for 88590015 ROM --
This is the actual idle adjustment table ...
Code:
<table name="Actual Desired Idle RPM" category="Idle" type="2D" address="3d24" scaling="RPM8">
<table name="Engine Temp" type="Y Axis" address="70c2" elements="8" scaling="Temp"/>
</table>
Code:
<table name="Idle Limit" category="Idle" address="1e30" type="2D" level="1" scaling="RPMTarget"> <table name="Conditions" type="Static Y Axis" elements="2"/> </table>
Code:
<table name="Idle Settings" category="Idle" address="223e" type="2D" level="1" scaling="RPMTarget"> <table name="Conditions" type="Static Y Axis" elements="2"> <data>Idle AC ON - Drive</data> <data>Idle AC OFF - Neutral</data> </table> </table>
Code:
<table name="Idle RPM" category="Idle" address="146c" type="2D" level="1" scaling="RPMTarget">
<table name="Conditions" type="Static Y Axis" elements="4">
<data>Idle RPM Neutral AC OFF</data>
<data>Idle RPM Drive AC OFF</data>
<data>Idle RPM Neutral AC ON</data>
<data>Idle RPM Drive AC ON</data>
</table>
</table>
Desired ISC position Neutral - 51B0
Desired ISC position Neutral AC ON - 5502
Desired ISC position Drive AC ON - 5510
Desired ISC position Neutral unknown(probably post warmup) - 3D4C
Last edited by TouringBubble; Aug 1, 2008 at 07:42 AM.
Jun 25, 2007, 03:01 PM
#3
I'm confused. Why are you messing with idle after an engine mount install?. The mounts don't affect the idle quality at all, just how much noise and vibration is transmitted into the cabin. Even you raise the idle slightly, it'll still produce noise.
d
d
Jun 25, 2007, 04:34 PM
#4
You are correct. The idle hasn't changed, but a slightly higher idle lessens the vibrations in the cabin. I've had the mount for a while and it's beginning to shake things loose now that it's summer and I've been using the AC more.
Trending Topics
Jun 25, 2007, 09:49 PM
#8
There are other tables to look at for the idle including stepper values. the first three tables are also desire idle, one of them with ac on. Since Ecuflash truncates the table name its hard to see, but if you go in and act like you are gonna edit the map def, the title shows up.
( 96940011 Rom MY2005 MR USDM )
milburn
( 96940011 Rom MY2005 MR USDM )
milburn
Jun 26, 2007, 07:28 AM
#15
Evolved Member
iTrader: (7)
Join Date: May 2005
Location: Southern, Ohio
Posts: 544
Likes: 0
Received 0 Likes
on
0 Posts
I'm trying to adjust my idle speed to smooth the rough idle resulting from my engine mount install. I've made adjustments to the idle RPM drive/neutral, but the results are odd. The idle adjustment seems to have worked for the most part without the AC on, but it will randomly drop below the requested idle. A blip of the throttle will usually fix this. However, with AC on (when the adjustment is most needed), the idle seems stock (around 740 RPM).
Drive and neutral idles are set to ~860 RPM. I'd like for my idle to be around 850 RPM with AC off and probably 880-900 with AC on. Any help would be appreciated. Thanks!
Drive and neutral idles are set to ~860 RPM. I'd like for my idle to be around 850 RPM with AC off and probably 880-900 with AC on. Any help would be appreciated. Thanks!