Hi, Paul,
I have a lead on a 1991 RX-7 (non turbo) that the owner says needs a throttle positioning sensor.  It idles at about 3000 rpm.  I have called my local parts dealers and it appears that a replacement part is from $400 to $600.  List is about $900.  How can I prove to myself it is in fact a TPS problem, and if it really is, do you or anyone else reading this, have a source that can save me any $$?  Do the race cars even use TPS's, and if not, can I get one they might otherwise throw away?
Thanks for any help you can provide.
Gerry Hanscom
P.S.  I'm going to be at Sun 'n Fun.  Hope to see you there, but I would like to react on this RX-7 before then.  Thanks again.                         


I might be at Sun N Fun. If so I plan to spend a lot of time in the Lincoln welding tent learning how to tig weld aluminum.

TPS are simple devices. Basically just a potentiometer connected to the throttle shaft . I suggest looking on Ebay. A unit for a different kind of car with about the same power would work.

Paul Lamar