Engine idle adjustment 91 vette
11-23-2011, 06:03 PM
#1
Advanced
Thread Starter
Member Since: Oct 2011
Location: Merritt island Florida
Posts: 50
Likes: 0
Received 3 Likes
on
2 Posts
Engine idle adjustment 91 vette
Greetings:
I have a 91 stock corvette, automatic transmission.
It idles at 750 to 800 rpm in gear with AC on.
Is this ok to drive it?
The manual says 400 rpm
I see a throttle idle adjustment screw, could I just turn it to the right
rpm? or do I need to disconnect some of the electrical stuff first?
The procedure in the haynes manual seems unclear & complex.
Should my mechanic do the adjustment? I dont know how to work on
corvettes, I do work on old harleys some, which is much simpler than corvettes.
Thanx in advance
N
I have a 91 stock corvette, automatic transmission.
It idles at 750 to 800 rpm in gear with AC on.
Is this ok to drive it?
The manual says 400 rpm
I see a throttle idle adjustment screw, could I just turn it to the right
rpm? or do I need to disconnect some of the electrical stuff first?
The procedure in the haynes manual seems unclear & complex.
Should my mechanic do the adjustment? I dont know how to work on
corvettes, I do work on old harleys some, which is much simpler than corvettes.
Thanx in advance
N
11-23-2011, 08:11 PM
#3
Le Mans Master
Don't mess with it ,you can only change idle speed by changing it in the tune...WW
11-23-2011, 08:21 PM
#4
Pro
Member Since: Sep 2007
Location: Commerce Twsp Michigan
Posts: 713
Likes: 0
Received 0 Likes
on
0 Posts
11-25-2011, 01:23 PM
#6
Le Mans Master
Looks high for closed loop idle if it's an Auto L98. To see what it's doing, you'll need a Scanner which will also give you the Coolant Temp Signal which determines the Targeted number. Specs are an Actual Idle of +/- 50 rpms from Targeted Idle in Drive; +/- 100 rpms from Target in Park/Neutral. I'd guess that if Acutal is within range, Coolant Temp Signal is skewed or the tune has been changed or your Tach is off (which you can also check/verify on the Scan).
