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Help!! It's doing my head in. It's got rough idle, hunting for revs. So I put a cheap scanner tool on it. DTC codes P2178 stored and p0172 pending and depolution system faulty warning on startup. I also noticed while poking around in the engine if I unplugged the cam sensor, idle would go back to normal, bit still run rich. What can I try. What I have done so far.
: Changed spark plugs
:New rocker cover gasket.
: New map sensor
: New cam sensor
 

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gonna follow this, as hope someone helps u find out what's wrong, i'm having a nightmare with mine running rich and rough tick over, cant get it to pass an mot
 
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