Engine Should Auto Trans Be in Drive When Setting Base Idle

markinms

5 Year Member

Mar 1, 2018

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Columbus MS

Jun 26, 2020

#1

• Jun 26, 2020

• #1

I've always set the base idle on my 5.0L/AOD combo with the trans in park.

I'm in the process of doing a tune-up and a friend stated I needed to set base idle with the trans in drive. He said it provides a more accurate idle speed.

How do you guys, with an auto trans, set your base idle speed?

Any feedback is appreciated.

Mark

 

General karthief

wonder how much it would cost to ship you a pair

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polk county florida

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#2

• Jun 26, 2020

• #2

Here is my take and keep in mind I am not a technician, I'm not even a very good shade tree mechanic.
Base idle is set in park, ac off. The air idle control valve, along with imput from other sensors will control the idle up thing through the computer when the vehicle is put in gear and/or ac engage,
He is confusing setting base idle on a carb'd vehicle where the idle is set manually and not computer controlled.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Jun 26, 2020

#3

• Jun 26, 2020

• #3

I always did mine in park

 

General karthief

wonder how much it would cost to ship you a pair

5 Year Member

Aug 25, 2016

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polk county florida

Jun 26, 2020

#4

• Jun 26, 2020

• #4

I park mine first.
Then set idle.
I have a 5 speed

 

markinms

5 Year Member

Mar 1, 2018

88

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Columbus MS

Jun 26, 2020

#5

• Jun 26, 2020

• #5

Thanks for the feedback! I'll continue to set my while in Park. Had to ask though.
Mark

 

Reactions: General karthief

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

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Jun 26, 2020

#6

• Jun 26, 2020

• #6

In park (or N), with wheels blocked, and the the tested parking brake applied Is the only way I’m adjusting idle speed. I’ll sit in the car with a foot on the brakes to test it in D and with the AC on. That goes got carbureted or EFI cars. I’ll let you know about electric and hover cars after I get to work on some. But I’m not going out of the car on purpose while it is in D.That can get ugly quickly.

 

Last edited: Jun 26, 2020

markinms

5 Year Member

Mar 1, 2018

88

14

18

Columbus MS

Jun 26, 2020

#7

• Jun 26, 2020

• #7

7991LXnSHO said:

In park (or N), with wheels blocked, and the the tested parking brake applied Is the only way I’m adjusting idle speed. I’ll sit in the car with a foot on the brakes to test it in D and with the AC on. That goes got carbureted or EFI cars. I’ll let you know about electric and hover cars after I get to work on some. But I’m not going out of the car on purpose while it is in D.That can get ugly quickly.

Click to expand...

Yep, it could get ugly real fast. Had my wife on standby to help out if necessary.

 

General karthief

wonder how much it would cost to ship you a pair

5 Year Member

Aug 25, 2016

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polk county florida

Jun 26, 2020

#8

• Jun 26, 2020

• #8

You may want to stand on the side by the fender, you know, in case she gets a flash back to when you last pissed her off.
just a word of caution