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post #1 of 4 (permalink) Old 11-07-2002, 08:54 PM Thread Starter
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Join Date: Nov 2002
Location: Weyburn Saskatchewan
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poor idle

I have an 87 turbo coup. It wants to idle fast. Everything looks like it is hitched up correctly. If you load the engine slightly by letting the clutch out the engine returns to a lower rpm. The engine will spped up and slow down while sitting ideling.

Any suggestions appreciated. Thanks.
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post #2 of 4 (permalink) Old 11-07-2002, 09:09 PM
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Join Date: Aug 2002
Location: St.louis
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Sounds like it's idle control valve or you have a vacuum leak. Buy a carb cleaner and spray it on the intake while the car is running, if the idle goes down when you spray it then you found the vacuum leak, if that doesn't work, take the idle control valve ( goes on the throatle body) and spray bunch of carb cleaner in it and let it seat for a half our, than put it back. It can also be tps sensor ( throttle position sensor), you can check it with the volt meter, or scan the car for any codes, tps sensor will always give you a code

90 35th anniversary sold
88 turbo coupe 14.1 at 96mph ( almost stock)
93 mustang lx sold
73 pinto station wagon ( mustang replacement), 2.3t will go in there in the future.
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post #3 of 4 (permalink) Old 11-08-2002, 06:35 PM Thread Starter
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Thanks for the suggestion. I'll give them a try.
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post #4 of 4 (permalink) Old 11-08-2002, 06:42 PM Thread Starter
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As I think about this more, when you referr to the intake, do you mean ahead of the turbo?
Usually spraying carb cleaner into the engine means taking the top off the breather and spraying.
Not exactly that easy on these engines.
Am I missing something?
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