82 High Idle
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Joined: Dec 2006
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From: Jacksonville NC
82 High Idle
My wife's 82 has an extremely high idle (2k) when she starts it up. After warming up for a minute or two, the idle does not go down. In gear while stopped, the idle is fine. After driving around town a bit, placing transmission in park, idle is fine. What could be causing the excessive high idle during first start? Thanks!
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
My wife's 82 has an extremely high idle (2k) when she starts it up. After warming up for a minute or two, the idle does not go down. In gear while stopped, the idle is fine. After driving around town a bit, placing transmission in park, idle is fine. What could be causing the excessive high idle during first start? Thanks!
Jim
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Thread Starter
Advanced
Joined: Dec 2006
Posts: 72
Likes: 1
From: Jacksonville NC
I will check the temp sensor and coolant level! However, the water temp sensor on gauge reads in the normal range.
Quick tap on accelator does not make idle go down
Thanks!
Quick tap on accelator does not make idle go down
Thanks!
Last edited by gevans; Mar 23, 2009 at 09:10 AM.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
The CTS and temp sensor for the gauge are different sensors. The CTS communicates with the ECM (computer). The temperature sensor is on the side of the block and communicates with the gauge.
The coolant level is important in the 82 because if its low the water does not touch the tip of the CTS sensor. So the sensor is just reading air in there at the beginning. Once the car warms and the thermostat opens water rushes by the CTS and a reading is taken.
If you have been under the hood lately also make sure you didn't knock a vac hose of somewhere.
Jim
Le Mans Master
Joined: Apr 2001
Posts: 5,000
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From: Minneapolis, Mn USA
Sound like the CTS is starting to change-fail. It does this gradually as it shifts the resistance reading it gives back to your ECM.
Change it, its cheap, and I'm sure youll notice a diference.
Mine was doing the same thing as yours. Symptoms worse on cooler days than wamrer days. Replacing the CTS took care of it.
Change it, its cheap, and I'm sure youll notice a diference.
Mine was doing the same thing as yours. Symptoms worse on cooler days than wamrer days. Replacing the CTS took care of it.
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Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
