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Discussion Starter · #1 ·
I just recently swapped a 3.8l from my dad's 92 mercury cougar into a friends 93 thunderbird and after a week of driving it the idle is stuck at 1500 RPM and then to 2200 RPM a week after that. He recently replaced the tps and the idle air control motor with junk yardparts and the idle went down to 1300 RPM. There are no vacumn leaks. Thanks for any help in advance.
 

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Discussion Starter · #4 ·
Thanks 187racing for the tips. The car was dropped off this morning and I will be working on it after work. Thanks again and I will let you know how it went.
 
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