Skip the auto shop - Our mechanics make house calls

Q: egr valve

asked by on

Can a car run without an egr valve and if so should it run like crap

My car has 200 miles.
My car has an automatic transmission.

A: The first EGR system was installed on cars ...

The first EGR system was installed on cars starting in the early 70’s. The engines before this did not have one and the emissions of NOX was high. The EGR system helped to reduce the output of NOX and allowed the ignition timing to be increased. Your engine if equipped with an EGR valve can run without the valve but may cause the engine to have pre-ignition pinging that could lead to holes burned in the pistons or spark plugs getting melted. You would need to lower the ignition timing until no pre-ignition is happening. The lower ignition timing will cause loss of some power, higher fuel consumption, lower idle, hesitations and surges. Also modification of emission components or removal is illegal,

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why am I losing a half of a tank of gas in 24 hours?

This is a problem likely related to your fuel tank sending unit and is unrelated to the faulty thermostat. This is a small float type component inside your fuel tank that measures the level of the fuel inside the tank....

Q: Engine starts but stalls immediately

This may be an issue related to what is called an idle air control module. This is a module that regulates the amount of air that is allowed into the intake system as it is mixed with the fuel before...

Q: stalls when put in gear

The idle control valve may be stuck or you have a vacuum leak. Try to disconnect the vacuum lines to the EGR valve to see if it still stalls. This may be due to problems in the vacuum system. Try...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...