Very Simple Question

[mkk50]

Does anybody know the sizes of the stock pullies? The girl that owned the car before me said she put underdrive pullies on, and i think that may be the reason for the high idle. Specfically, the crank and alternator pullies. Thanks

 

[dyb003]

I would think you would be able to tell just by looking at the color of them. I woulf think they would be polished alum or chrome if it had under drive pullys.
I wouldnt think it would cause an hight idle. Try cleaning out the thro body inside, if that gummy and dirty it can cause a eratic idle. Check the code to see if you have a bad TPI or coolant sensor. If you dont have a code reader you can go to Auto Zone and they will do it for free. Good luck

 

[stangbear427]

Don't know about the alt/h2o pullies, (or the exact sizes) but the crank should be obvious. The stock crank pully is huge ugly contraption, the ribbed portion is several inches diameter larger than the hub. An underdriven pully is about the same as the hub.