High Idle
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Joined: Sep 2009
Posts: 72
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From: Lawndale, CA
Car: Turbo Trans Am #579
Engine: 231ci (3.8L) LC2 (Buick Turbo)
Transmission: 200r4
Axle/Gears: Borg-Warner 9-bolt
High Idle
Hello everyone,
I'm working on a 1987 Formula 5.0. I'm currently having problems with a high idle (2k rpm). No trouble lights or anything else come on. The idle stays high while driving and after warm up. How do I get this down?
Also, I have zero experience with carburetors, is there somewhere I can read up on their operation?
Thanks.
TTA579
I'm working on a 1987 Formula 5.0. I'm currently having problems with a high idle (2k rpm). No trouble lights or anything else come on. The idle stays high while driving and after warm up. How do I get this down?
Also, I have zero experience with carburetors, is there somewhere I can read up on their operation?
Thanks.
TTA579
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Member
Joined: Jun 2011
Posts: 111
Likes: 1
From: Phoenix , Arizona
Car: 1983 Z-28.. Owned since 1985
Engine: LG4 (H) Vin Code
Transmission: 700R4
Re: High Idle
DON'T TOUCH THE CARB JUST YET.
Check your Vacuum Hoses conections. You should have a vacuum hose schematic label on or around the upper radiator fan shroud. After working on, or cleaning around the engine, it's easy to disconnect one of these little hoses. I have done this many times in the 28 years that I have owned my '83. Same thing.... RPM at 2k... can't kick the carb down even after warming up.... Take your air cleaner off and just start checking all vac lines.
Check your Vacuum Hoses conections. You should have a vacuum hose schematic label on or around the upper radiator fan shroud. After working on, or cleaning around the engine, it's easy to disconnect one of these little hoses. I have done this many times in the 28 years that I have owned my '83. Same thing.... RPM at 2k... can't kick the carb down even after warming up.... Take your air cleaner off and just start checking all vac lines.
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