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Old 6th August 2017, 02:53 PM
garyt garyt is offline
Senior Member
Join Date: Jun 2014
Location: Dufftown, scotland
Posts: 480

Hi first the idling when it's cold it's fuel rich (choke /cold start) as it warms its given less fuel so it sounds like you have an air leak induction side causing it to lean out and rev a bit
Hand brake, if it's a std sierra setup get a helper to pull the hand brake on , are the calliper hand brake mechs free or binding, are the cables moving before max pull
If you get rear brake efficiency/ lock with the pedal then it has to be the hand brake cables or mechanism on the. caliper
Good luck
remember we are not mad just creatively insane
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