I discovered this problem with my TPS while checking my
dashpot. With the dashpot hose pinched the motor rpm's
can't drop to idle, they stay at 1800 or so which is
correct. But while doing this I noticed that the engine
speed was surging between 1700-1900 rpms. It seemed like
the ECU was getting two mixed signals and couldn't make
up it's mind whether to go to idle or the 1800 rpm. So
I decided to retest my TPS. My VTA-E2 ohms are dead on;
500ohms and 4700 ohms. But the IDL-E2 readings seem way
off. At .57mm I only get 12 ohms and at .85mm about 13
ohms. It does go to infinity, but not until the throttle
is opened about 1/4". No amount of adjusting would get the
readings within spec's. Right now the TPS is adjusted as
far as it will go CCW to get it the VTA-E2 readings where
they are now. I opened the TPS up to look at the printed
circuit surfaces. They were solid black on white plastic;
does this sound right? I cleaned the contact surfaces with
alcohol anyway...no change after. At this point I'm
thinking the TPS is just worn out and needs replaced, but
before spending the hundred bucks I'd like to get some
opinions from here that agree with that assesment. Thanks
for you input.

-Indy