Will a bad EGR valve cause low idle?
Over time, the EGR valve can fail in the open or closed position. An EGR valve that is stuck open can result in a fuel-air mixture that is too lean. This can cause a rough idle. A faulty EGR valve may also cause your Check Engine light to come on, in which case a code reader may reveal the culprit.
Does EGR affect idle?
One of the most common symptoms of a problem with the vehicle’s EGR valve is a rough idle. It is not uncommon for EGR valves to malfunction and become stuck in the open position. This can lead to exhaust gas recirculation to occur causing a rough idle even when the conditions are not desirable.
Can a bad EGR valve cause a misfire?
Possible engine misfires Another sign the the EGR valve has gone bad, is engine misfires. A bad EGR valve may cause random engine misfires if it is causing a vacuum leak in the engine.
What’s the EGR flow code on a 99 Camry?
I just changed the engine in my ’99 Camry with 231K mi, went and runs smooth as silk. But on the test drive the check engine light illuminated. Using my scan tool revaled code 401- Insufficient EGR flow.
Is the EGR valve supposed to run during idle?
However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up. If it runs at any of these times, the performance of the engine is affected.
Why is my EGR valve stuck in the open position?
One of the most common symptoms of a problem with the vehicle’s EGR valve is a rough idle. It is not uncommon for EGR valves to malfunction and become stuck in the open position. This can lead to exhaust gas recirculation, which causes rough idling even when the conditions are not desirable.
Why does the fuel management light stay on when the EGR is open?
This means the amount of hydrocarbon gases emitted from the tailpipe increases significantly producing a fuel smell. Your engine management light may stay on once your car detects an issue with the EGR valve. This could be caused when the EGR is either constantly closed or open.