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.

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: What could be the problem? Overheating and leaking. 2004 Nissan Sentra

Hi there, thanks for writing in about your 2004 Nissan Sentra. Any coolant leaks need to be addressed soon. There isn't any condition where loss of coolant is okay. Whatever is leaking needs to be repaired. If it is overheating...

Q: Where and how do I check the transmission fluid? 2007 Toyota Tundra

Hi there - there is an oil port on the side of the transmission case where oil level can be checked. Requires getting the truck up on a lift. There is a specific process (and fluid temperature) for this check,...

Q: Gas is pouring out of the throttle body. What would cause this?

The fuel pressure regulator is leaking fuel into the intake manifold and may have even filled the engine oil with gasoline. You should have the fuel pressure regulator replaced and the oil and filter replaced. You may have to have...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...