Mine looked exactly like the one on Gazza82's Idle Saga rather than the one in your photo.
The plastic gear mechanism just followed the entire range of travel of the throttle plate as it rotated. Then when activated, the motor only actually drove the gears and hence the metal lug round by a few degrees to offset the plate and put the idle on. But I don't remember seeing anything like those variable resistance tracks in your photo (a throttle position sensor) ?
Is there a motor driving the metal sprocket on the RHS ? If there is then this looks like a TPS and idle actuator combined in one device ?
Is this one of the differences between the 98 pre Euro 3 emmisions engine and/or the pre and post the fly by wire 2.0 TS engine - no TPS ?
Last edited by rt05492; 18-10-11 at 21:00.