I noticed lately that the effective range of my garage door opener
is greatly reduced when the engine is running vis-a-vis when it is not.
This was not always the case and wonder if it may have something to do
with some kind of electrical shielding removed or disconnected during
one of the regular maintenace visits at my Honda dealer. The car is a
'94 Accord LX model that otherwise runs just fine.
The only reason I can imagine for this behavior is that somehow the
electro-magnetic field around the running engine is interfering with the
garage door opener's RF signal but I'd like to hear from anybody
knowledgeable on this subject. I have no idea what exactly a service
technician could have done to cause this effect.

Rudy