[flipscobra]

I own a SPF BB an my throttle was sticking, very scary when sticks WFO. I got to looking as to where it was sticking an found out where it it comes into the engine bay thru the firewall that bushing was galling or sticking to the throttle linkage. TO fix it just spray WD40 on it evey now an then. I also had your problem, my throttle was not opening but about 1/2 way, I had my son mash the gas WO an watched the butterflies. The set screw in the first arm on the shaft that comes thru the FW was moving about 3/8 in the arm before the armed moved, retightend set screw an what a difference. You have to keep an eye on these things in a SPF. Flip