Is idle computer controlled?
08-06-2004, 03:30 AM
#1
Junior Member
Thread Starter
Join Date: Aug 2004
Location: North norway
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Car: Camaro Z28
Engine: LG4
Transmission: 700
Is idle computer controlled?
If the idle solenoid is controlled by AC on/off ;Does this mean that the idle is not computer controlled on my LG4 engine? This will make adjustment easier....
If the sparkplugs are going bad/old; Would they perform bad when the engine is cold, and better after the engine becomes warm?
If the sparkplugs are going bad/old; Would they perform bad when the engine is cold, and better after the engine becomes warm?
08-06-2004, 11:35 AM
#2
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 35 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The idle is a mechanical adjustment on the side of the carb. See the pictures in the post about needing a carb diagram.
The "high idle" comes in two parts: the choke high idle, which is located on the bottom of the carb, opposite side from the main idle adjustment, adjusted from the back; and AC solenoid adjustment, where you turn the hex bolt sticking out of the solenoid while engaged to adjust the idle speed.
I swear the solenoid will engage during certain de-acceleration events, which would indicate there is a computer involvement as well, but I've never traced down that circuit to verify.
As for the plugs: It is possible they don't work as well cold as when the engine is warmed up. The mixture is a little easier to ignite when the engine is at operating temperature.
The "high idle" comes in two parts: the choke high idle, which is located on the bottom of the carb, opposite side from the main idle adjustment, adjusted from the back; and AC solenoid adjustment, where you turn the hex bolt sticking out of the solenoid while engaged to adjust the idle speed.
I swear the solenoid will engage during certain de-acceleration events, which would indicate there is a computer involvement as well, but I've never traced down that circuit to verify.
As for the plugs: It is possible they don't work as well cold as when the engine is warmed up. The mixture is a little easier to ignite when the engine is at operating temperature.
Thread
Thread Starter
Forum
Replies
Last Post
eightsixseven
Tech / General Engine
1
08-14-2015 03:09 PM
