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If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate.

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โˆ™ 2011-03-19 15:21:46
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Q: How does the car know the EGR valve is bad?
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Would a bad EGR valve on a 1987 Volvo 240 DL have any effect on passing the NOx for emissions?

Yes, if the valve is bad. With the car idling, move the EGR valve diaphragm with your fingers. The engine should quit or want to quit. If it doesn't do this, it could be plugged up. Remove the EGR valve and clean any carbon deposits in the valve and also do the same on the engine side where the EGR valve is connected. If the EGR has never been removed before, it will probably have carbon buildup.


What does it mean when your car starts but dies when the rpms get lower than 1 or when you make complete stops?

The idle speed solonoid needs cleaning or replacing or carb needs overhauled. The EGR valve could also be stuck in an open position. The EGR valve should be closed when idling, otherwise the engine will die. When driving at town/city speeds or higher, the EGR will be open.


What can cause the engine oil to overflow onto the spark plugs of a car engine?

possible bad valve guides or blown head gasket possible bad valve guides or blown headgasket


What would cause a car to idle heavily?

The egr has nothing to do with idling high, the egr valve is not used at all at no load. and if there was something wrong with the egr valve it would cause the idle to be very low. check your EGR valve for leaks on your exhaust manifol. If you have a factory service manual, they have trouble shooting on almost everything about your car. Check your Air filter or Fuel filter. I replace my air filter once a year, Maybe replace your Fuel filter after 30,000 miles. A high idle is typical of a vacuum leak, I don't know where the above answer has any relation to this. if you have a carb, it may not be adjusted correctly.. from: jay c.-- In my own humble opinion, irratic idle is typical of a vacum leak. I had the same problem with my 8 year old sedan, Had the idle air control valve checked, Air Flow Valve, and throttle serviced... all did not solve the fluctuating idle. My mechanic suggested to replace the gaskets (rubber seal) of the valve cover and the manifold, my car's idling perfectly, it's smoother and sounds much better. My mechanic told me that the previous repair used an inferior gaskets and compensated it by using silicon sealants... the silicon sealants eventually wore-off leaving gaps, causing leaks.


Where is the map sensor on a 95 Monte Carlo Z34 3.4?

it took me quite a while to figure this out myself. it's a current problem on my car. It is on the drivers side of the upper intake manifold. Below the EGR valve.

Related questions

Can i drive my car with a bad egr valve?

yes


Where is the egr valve on the 91 Pontiac Grand Am?

Would this cause the car not to start If the EGR VALVE is bad


Would a bad egr valve make car shut off?

yes


Is there an egr valve in 1992 Pontiac Bonneville and where is it located could a bad valve keep you car from starting and running properly?

AnswerThe 3800 (RPO: L27) was not equipped with an EGR Valve for the model year 1992 only. The 3800 (RPO:L67) does have an EGR valve.The valve should be located on the driver's side on top of the manifold.A bad EGR valve can keep your car from starting and running properly.


Cost of replacing a egr valve?

The cost of replacing an EGR valve varies with the make, model and location of the car. An EGR valve for a 1996 Lincoln Town Car is about $160.


How do you know when a egr valve go bad on a Toyota Camry 1997?

It does not happen as often as you might think. But it does happen. Usually EGR valve goes out if you car is 10 years and older and you have way over 100K miles. Also if the valve is cleaned regularly it will work longer.


Where is the egr valve on a 1993 dodge spirit?

if this is a v6, unless your car has California emissions, there is no EGR valve.


Where is the EGR valve on 1993 dodge spirit?

if this is a v6, unless your car has California emissions, there is no EGR valve.


Where is the egr valve on a 93 explorer?

its on the car


Can you block egr valve off on a terrano?

Blocking off an EGR valve can make the car run rough. The fuel mileage can suffer as well, since the car is designed to have the EGR valve operable.


Will a bad egr valve cause your car to idle rough or die?

It is a common suspect in contributing to rough idle. See "Related Questions" below for more about the EGR valve, from testing to replacing.


Would a bad EGR valve on a 1987 Volvo 240 DL have any effect on passing the NOx for emissions?

Yes, if the valve is bad. With the car idling, move the EGR valve diaphragm with your fingers. The engine should quit or want to quit. If it doesn't do this, it could be plugged up. Remove the EGR valve and clean any carbon deposits in the valve and also do the same on the engine side where the EGR valve is connected. If the EGR has never been removed before, it will probably have carbon buildup.

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