Cars & Vehicles
EGR Systems
Oxygen Sensors

Is running your car on a bad EGR harmful to your engine?


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2004-05-26 19:49:52
2004-05-26 19:49:52

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.


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

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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.

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