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Idle speed

Posted: 12 May 2018, 15:33
by Acehi41
My 1997 Regius 3L diesel has developed a small fault, when starting up (hot or cold) idle speed is normal but within a few seconds it jumps up to 1100 rpm until I engage gear when it drops to normal again 750 rpm. Any one had a similar fault or have any idea what might be causing this problem. I don’t have an idle up switch on this model.

Regards,
Paul.