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Do you have to use the egr valve on 305 or could you just block it off?
Wiki User
∙ 14y ago
No you need the EGR valve as these gases need to be vented from the crankcase. An EGR unit that has failed will cause your vehicle to run rough and use more fuel. The three letters in EGR stand for " Exhaust Gas Return". If your valve has failed it is best to replace it.
+_+_+ Actually the above answer is wrong. EGR valve system is used to add a small amount of exhaust gas to the combustion chamber for emission purposes. It also keeps the temperature of you engine lower. It is not active at idle or at WOT (wide open throttle) when they fail they put the exhaust gasses in the combustion chamber at idle making it run rough. IT IS NOT NECESSARY! Block off plates can be purchased or created. +_+_+
+_+_+ PCV Stands for Positive crankcase ventilation and that is a small device in the valve cover. +_+_+
Wiki User
∙ 14y ago
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