Possible damage to engine if driven with a bad EGR valve for a prolonged period of time (9 months)?

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Steve Lee - 13 Mar 2004 05:00 GMT

My 2003 Pilot finally threw up an error code which confirmed that I
have an improperly functioning EGR valve. However, I've long
suspected this because I've had the usual symptoms for about 9 months
now.

Could having had driven a car with a bad EGR valve for such a long
time inflict any kind of damage to the engine/emission system or to
anything else at all? When I take my Pilot in for service next week,
can anyone think something I should have checked out due to my
prolonged EGR situation?

The most notable symptom I experienced with this bad EGR valve was the
big vibration/shaking it would produce. I would feel it starting from
the engine, then right away, the whole car would shake. Should I have
them inspect the engine mounts and other places in the engine well
with bolts holding the engine?

Also, I felt very noticeable hesitation, almost a buckling sometimes
at low speeds with below 2K RPM (at 25MPH (40KM/H) and at 35MPH
(60KM/H)) and felt as though the transmission was skipping or
operating improperly. Is this something a bad EGR valve could have
made my car do?

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Sean Dinh - 13 Mar 2004 09:18 GMT

On certain Civic, EGR only recirculate exhaust air to a single cylinder
while the engine is idling, on a car with automatic transmission. EGR is
there to reduce minor emission. Its side effect is erratic idle. If it's
stuck on, the engine would shake at idle. It shouldn't cause any engine
damage.

> My 2003 Pilot finally threw up an error code which confirmed that I
> have an improperly functioning EGR valve. However, I've long
[quoted text clipped - 18 lines]
> operating improperly. Is this something a bad EGR valve could have
> made my car do?

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