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83 Thunderbird idle problem


foreverkeeps's Avatar
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Join Date: Nov 2002
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05-14-05, 09:39 AM   #1  
83 Thunderbird idle problem

83 turbo thunderbird, fuel injected, computer sensors, etc, make it hard for adjusting a high idle.

When tbird starts, it idles real high, like 3000 rpm I think. And then it will go up and down, 1000 to 2000 at random, etc, when driving.

We suspect possibly the TPS sensor, but wanted to get some more info before spending money on something that might not be the problem.

Advise?

 
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bejay's Avatar
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05-14-05, 12:07 PM   #2  
you should have codes read, you can sweep the tps sensor with a analog voltemeter with the key on and look for any glitches where the voltage falls while slowly opening the throttle your voltmeter will be attached to negative and positive lead probe into the center wire or usually the green wire at the tps.

 
foreverkeeps's Avatar
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05-14-05, 01:04 PM   #3  
And if it 'glitches' this will show the TPS sensor is bad?

 
bejay's Avatar
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05-14-05, 02:19 PM   #4  
yes it should read stable and climb slowly as throttle is opened any dips in voltage would indicate a bad tps. if you have an analog meter you may be able to read codes with it if it is an eec4 system, if it is eec 3 it will not store codes after the key is turned off and is pretty useless for diagnossing most problems.

 
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