2001 S60 ETM Throttle plate movement problem

chv3ch · Post by **chv3ch** » 24 Mar 2021, 05:12

Should the throttle plate on ETM spring back to closed position when moved? Mine seems to be sticky - see video

VID_ETM_20210323_151517853.mov: (769.25 KiB) Downloaded 152 times

Post by **jonesg** » 26 Mar 2021, 18:58

chv3ch wrote: ↑24 Mar 2021, 05:12 Should the throttle plate on ETM spring back to closed position when moved? Mine seems to be sticky - see videoVID_ETM_20210323_151517853.mov

watch video at 15:05 mark, spring loaded butterfly.

pbierre · Post by **pbierre** » 26 Mar 2021, 19:57

No, the throttle flap is not sprung to close. It's motor-driven with a servo-controlled motor. The ECM tells the ETB position-sensor the desired angle, then the motor drives the flap until the position-sensor is satisfied.

What can happen is that gunk builds up where the flap closes preventing full closure, and that can make the idle run lean. Cleaning the body cavity and throttle plate solves that issue.

Post by **abscate** » 30 Mar 2021, 09:41

Moved to the active S60 Forum as an active problem for digestion...