I've been trying to test or adjust a tps that has been giving me trouble. The sled is inconsistent and often sounds like it's bogging out. When testing baseline, throttle cable disconnected and adjustment screw backed off, I get inconsistent MVs. The values jump all over and occasionally say overload. I haven't even begun to loosen the tps or try the throttle range since I can't get it to read anything close to normal. Is this a symptom of a bad tps or is my fluke meter going crazy?