Hyundai Repair: 2001 elantra, throttle position sensor, stop screw

Question
Okay does that mean that the new sensor that I bought could be bad if it was the old style? Is there a new part number. The part on the cable, does that meen that the (choke butterfly vaule) should be completely closed if the cable is good? I will check the PCV hose> Thanks-------------------------------------------
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-----Question-----
I have a 2001 elantra that has an idle problem. I have replaced the throttle position sensor. Thats what the tester said was bad from the error code check engine light. What it is doing is randomlly revving to 4000rpm and then back to 900. After it heats up when you put it in park it races to 5000 and stayes there. It is a 2.0 l engine automatic . Where can I find the sensor names and locations info .Also changed the PVC vaulve an sprayed out the Throttle body (it had a black sticky coating in it.
Thank you for any help.

-----Answer-----
What you describe sounds like the typical throttle position sensor issue.  Did you install a new sensor?  Many sensors around 2001 had problems, so if you purchased one used, it's likely no good as well.

I've also seen the symptoms you describe caused by a hole in the PCV hose.  You should probably check that as well.  

Also check the throttle cable to be sure it's in good condition and has enough slack that it isn't holding the throttle open.

You should be able to find complete information on the sensors of your vehicle in the shop manuals at www.hmaservice.com.  You'll need to register for a free account, and the site requires Internet Explorer.

Answer
If it's a new sensor (especially if it's a factory sensor), it should be okay.  The supply of sensors from manufacturers having problems has been exhausted from Hyundai's supply, so there should be no issue with needing another part number.  

As for the cable, yes, I mean that the throttle should be completely closed, i.e. it the lever hits the stop screw when the cable is released.  You should be able to feel some slack in the cable if you grab the cable with your hand-- not a lot, but enough so that there's no pressure on the throttle.

You might also try starting the car and then grabbing the throttle position sensor connector and wiggling it a little.  If it changes significantly the way the car runs, then your problem is in the sensor or connector.  If you think it might be in the connector, try spraying the connector terminals with contact cleaner.