extruck wrote on 09. Sep 2011 at 00:04:
had fault codes 0115 ect sensor to high 0130 o2 sensor circut open 0170 fuel trim mixture lean and 1405 egr valve acturall valve low . fitted new egr valve and ect sensor hoping wod clear lean mixture and o2 fully serviced inc fuel filter and throttle body seems exhaust blows at manifold when starts but dissapears aftrer acouple of minutes had codes cleared but came back on next day is their any internal workings to egr in cylinder head
Just a drilling to channel exhaust gases out of the back of the head, through the valve, and a channel in the casting that the valve sits on, then another drilling in the intake side of the head to take the flow into a channel within the inlet manifold. I guess any part of this pathway could become partly or completely soot-blocked, if the engine has been run for a long while in poor condition.