A 2000 RPM idle in your 1995 3000GT could be caused by several issues, including a vacuum leak, a malfunctioning idle air control valve (IAC), or a dirty throttle body. Additionally, a sticking throttle cable or issues with the engine's sensors, such as the coolant temperature sensor, could also contribute to a high idle. It's advisable to check for any error codes and inspect these components to diagnose the problem accurately.
cause if its idling at zero rpm the motor is off ...
It could be a dirty air filter or a dirty throttle body.
the throttle could be stuck! pop your hood and see if its pulled back!
The most common cause of the whistling in a 2003 Impala is a vacuum leak. Any of the lines under the hood could be causing the noise.
probably bad TPS, or IAC sensors
Very vague information. Could be the main jet in the carburator.
Timing belt could be bad and could have jumped a tooth or you need a toon up.
Listen and look for a vacuum leak. Could be anywhere.
There could be a vacuum leak somewhere causing the engine to idle too fast. It would also cause the engine to run too lean and possibly burn a piston.
Could be clogged converter in the exhaust system..
see previous answers, but if it idles high it might be the Mass Airflow Sensor. if your car idles too high for too long and you keep driving it, you could burn out the transmission module (very expensive )
My 1990 idles at about 850 and with the ac on 1100