Throttle sticking wide open!
 

I have had sporadic episodes of the throttle body sticking wide open...sometimes at very inopportune times! No recent work done on the car and I have checked interference from the carpet at the pedal...cable...cable routing...TB spring, and TPS sensor as I had drilled holes out a bit to set TPS to.980 VDC, etc. and can find nothing definitive. It does not do it all the time but has got to the point I am very reluctant to open it up unless the road ahead is VERY clear!!!!

Anyone experience this problem? Any ideas would be appreciated. It's a FRPP 65mm TB.