Best Answer

EGR recirculates exhaust back into the intake. It's function is generally to reduce cylinder temperatures (and some emmisions maybe) It depends on how it's failed. If it's failed in the open position, I'm guessing it may cause hard starting. If it fails in the closed position your cylinder temps will be higher. This makes a few things more likely to happen. #1 You could damage your exhaust valves. I've got a Geo Metro with a 1.0 liter engine. Smaller engines seem very sensitive to this. After my EGR failed, it burned up the valves in about 3000 miles. By the same token, my Plymouth Horizon had the same issue for 10000 miles with no noticable affect. #2 You may get pinging or pre-ignition more easily. #3 If you are running it hard or your cooling system isn't up to snuff, you are more likely to overheat. ...#1 is the worst, and causes permanent damage quickly in some engines.

User Avatar

Wiki User

โˆ™ 2004-05-26 19:49:52
This answer is:
User Avatar

Add your answer:

Earn +5 pts
Q: Is running your car on a bad EGR harmful to your engine?
Write your answer...

Related Questions

Could a bad egr valve in a Chevy cause the engine not to restart after it has been running?

A bad EGR valve should not cause the engine to not start. There is most likely another problem that is causing the engine to not start.

Will a bad egr valve cause check engine light to come on?

It can.

How do you tell if Alternator is bad?

Get engine running. While the engine is running disconect the POSITIVE termninal from the battery. If the engine dies, the Alterntor is bad.

Can a bad egr valve cause your check engine light to flash?

Yes it can if it is bad you will see the cel

How do you tell if a 1993 chey p.u. egr valve is bad?

Start the engine, and spray a little carb cleaner around and on the EGR valve. If the engine changes sound are idles up are down then the valve is bad.

What are the signs of the egr valve going bad in a Chrysler 300?

Check engine light on

Would a bad EGR valve in a 2000 Toyota Solara make the engine light come on?

Yes, it would. I have an '01 Solara, and when I took it to the dealership to see why my check engine light was on, after they scanned it, they told me that it was due to a bad egr valve.

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.

What are the symptoms of a bad EGR valve in a 2000 Saturn SL?

A bad EGR valve in a 2000 Saturn can have several symptoms. The EGR valve can cause misfires, the valve can cause vacuum leak style problems. There could also be an engine knock.

How does the car know the EGR valve is bad?

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.

How do you know when the egr valve is bad?

Depending on the vehicle the check engine light would illuminate.

Your 1988 truck keeps giving the check engine codes out for bad egr valve and bad oxy sensor but both have been replaced?

my egr didnt have a gasket so i was getting a air leak

Will bad egr valve cause vehicle to stall in hot weather?

Even a good EGR valve may cause an engine to stall in hot weather.

What is Ford trouble code 0409 What do I buy to fix it.?

The P0409 code indicates an exhaust gas recirculation (EGR) circuit malfunction. It could be a bad EGR valve, a bad EGR optical sensor, a bad powertrain control module (PCM), or a bad electronic control Module (ECM), also referred to as the engine control module.

What does EGR code 335 Out of Range mean on a 1994 Continental 3.8 L?

It means your DTFE sensor is bad. it tells the engine if your EGR valve is open or closed

Can a bad EGR valve cause the engine to backfire?

It can cause massive Engine failure and blow up the whole car, so be careful.

How do you know if a egr valve is bad?

Depending on the year, make, model and engine, the engine may have a rough idle, poor performance,\ and check engine light illuminated.

How do you know if your EGR is broken?

If the egr valve is stuck OPEN - the Engine will run Very rough & idle bad - or not idle @ all-if the egr valve is starting 2 stick IT WILL TURN ON THE CHECK engine light-Sometimes U can take the valve off & clean them with a GOOD carb cleaner.

Can a bad erg valve interfere with transmission functions?

Yes it can! EGR valves use engine vacuum, as does the transmission

Could bad spark plugs make a engine shake?

Bad engine cushions can make the engine shake. bad spark plugs cause malfunction as the car starts running.

Can a bad EGR valve cause high hydrocarbons?

Yes, the EGR valve, or port EGR

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 is the symptoms of a bad map sensor?

Engine running real RICH / To much fuel. Smokeing black out of the exhaust engine running ROUGH.

96 cavalier intermittently dies when you stop then starts right up when you have the ac on then at times idling smoothly it almost doesnt seem like its running then other times its running super rough?

The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases. ProsThe EGR valve is vital to your car's emission controls.Cons When the EGR valve goes bad, it must be replaced.Description EGR Valve = Exhaust Gas Recirculation Valve.The EGR valve controls formation of noxious emissions.Rough idle and poor acceleration can be caused by a faulty EGR valve.

Can the egr valve affect the idle?

Yes. Carbon deposits in the EGR valve can cause it to stick open a bit and cause a rough idle. If it is bad enough, the engine will stall out when you slow to a stop.