cossieboyIOW

any ideas lol the rs is revvin high on idle sometimes 2-2.5k... if i leave it sat still it will go down to about 1500 for a few seconds then randomly go back up to over 2000 then start revvin a bit before goin back down to 1500 again... its efi but i cant find an airleak??

Raj B

have you tried to disconnect the idle speed control valve to rule it out? my fiesta rs used to do that due to the isc valve being faulty, when I disconnected it the revs drop very low but it stopped them going up and down.

hope this helps