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Q: What's the difference in egr gas recirculation valve and an egr vacuum controller?

asked by on January 08, 2018

Im trying to get my car to pass emissions. I replaced catalytic converter, the mass air flow sensor, an 02 sensor, new fuel pump and an egr valve. Last 2 parts put on were the 02 sensor, and egr valve. Car ran great before those 2 additions. Looks i have an egr gas circulation valve instead or egr vacuum controller. Is there a difference? Car will crank but once it runs a while, it cuts off...

My car has 28885 miles.
My car has an automatic transmission.

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The EGR valve is the component that actually admits the flow of exhaust gas into the intake. The EGR vacuum controller modifies the amount of flow through the EGR valve based on the level of engine intake vacuum where the level of intake vacuum is a proxy for engine operating (load) conditions. It sounds like you have a stalling issue. Fuel supply faults are a possible cause of stalling as are vacuum leaks and faults with engine sensors. YourMechanic offers a stalling diagnostic. If you request that service a certified Mechanic, dispatched by YourMechanic right to your location, will get this problem resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Volvo
1995
L4-2.3L
940
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