I have a 2004 Chrysler PT Cruiser with a 2.0 n/a 5 speed manual (engine code: ECC) gasoline engine. I have recently cleaned the throttle body using throttle cleaner (I took off the part... didn't clean it on the vehicle). After that i have noticed that while driving if I take the foot off the gas pedal the car doesn t perform engine brake as it should. It doesn t decelerate too much (the vehicle almost keeps the same speed especially at lower speeds). If i put it in neutral while driving. The RPM s stay at 1500 until i brake to a full stop and then they return to normal idle. If i rev the car while parked there are no signs of malfunction. No check engine light has come on. I have also checked the throttle cable and it s moving freely. Could it be a faulty IAC valve? Would replacing it solve the problem?

Thanks