holding revs

[petery]

just got my Chim 500 back from an engine rebuild and its holding revs at about 1700rpm when coming to a standstill in traffic or slowing down so makes driving in traffic a bit difficult, it does drop down to about 1000 rpm after about 15/20 seconds stood still.

Any idea what could be causing it it?

[bobfather]

The stock answer is 'stepper motor'. It gets sooted up and this causes it to sit too far open. Remove, clean, refit, all should be well.

[V8FROG]

mine did that and it wathe lamda!!