fww

could you please help after cleaning the throttle body on my st150 fiesta the idle rpm is 2000 for 5 seconds then back to 900 .when in top gear it will not fall below 1100. when clutch is pressed at junctions revs rise to 2500 for about 5 to 10 secs then back to 900 .it all checks out on diagnostics

frsjon

when you say clean it did you take it off? sounds like a air leak...or throttle position sensor problem

RichieST

iTrader: (2)

You've probably removed the coating off the inside of the throttle body thus causing an air leak past the butterfly. You should never clean them unless the butterfly is sticking open.