Quote:
Originally posted by possumfat9
Yes, Dip stick pops out. Pcv valve has been replaced and is ok. This is strange problem because its like motor operates in closed envirament. Car cranks right up and runs good for about 3 minutes driving time. Then runs like crap and if I press gas petal to go faster than the 5 mph its going, it will spudder and blow oil everywhere. After gauge reaches normal operating temp all is fine except all the oil smpke from where it got all over exaust. I just would like to know how this egr vacuum control operates. Thanks
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Hi Possum,
the way the EGR is suppose to work is this. When the engine gets up to operating temp, the ECU opens the EGR solenoid valve, to allow exhaust gas to enter the inlet manifold to cool the combustion chamber down, to prevent the formation of oxides of Nitrogen in the exhaust gas.
There are three componets in the system. The EGR solenoid valve, the EGR valve, and the BPT valve. The ECU turns the system on when the operating temp is reached. The system is then controlled by the throttle butterfly position.
When the throttle valve is in the cruse position vacuum is applied to open the EGR valve to allow the recirculation of the exhaust gas to the inlet. This flow is modified by the BTP valve by bleeding the throttle vacuum away from the EGR valve to vary the amount of gas recirculated, in line with throttle position.
The things to note are, it should only operate when the engine is at operating temp and with the throttle in the cruse position.
Where is the oil coming from? You could try unplugging the EGR solenoid to see if the trouble goes away. If it does not, it is not the cause of the problem.
Harvey.
