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[TheKoreanDream]

well im new on here, but i figured mabey someone can help with this...
(my car is a 2003 tiburon)
While driving, accelerating, slowing, coasting, etc. when i push the clutch in, the RPM's do not drop down right away, it takes a few seconds (sometimes up to 10 seconds) for them to slowly drop back down. Usualy i have to just jam it into gear when im in heavy traffic or else i would get rear ended waiting for the rpm's to drop so i can shift.

maple hill auto service wanted me to buy a new exhaust manifold and they told me that it would fix the problem and cost like 1700 dollars sooooo I bought a used one in great shape for 60 dollars, threw that on there, and the problem remains.
the clutch seems fine, but I've only owned the car for about 3 months.

so far i have replaced
-throttle body
-Stock exhaust manifold (old one was cracked)
-O2 sensor.
-Throttle position sensor
-Idle Air Control sensor

Ive checked my throttle cables and lubed them up along the spring aswell. they don't stick.

but anyway, just looking for some advice and suggestions besides parking it on the train tracks over night.
thanks