Originally Posted by
bhindzioncurtain
So kind of noticed the noise for a while but today when I pulled in garage the sound did not stop when I turned off car. Opened hood and noticed the smog thing was squealing and would not go off when I smacked it so I just unplugged in.
Anyone have this happen and what did you do: repair or replace?
I have a 05 SRT-6

A VERY GOOD CHANCE the relay in the RCM has stuck/welded in the 'closed' position. Leave the air pump unplugged until you get a replacement RCM but you might still have to get a different air pump if it is damaged beyond normal use. IF this is the reason send your RCM to tighed1 and have it rebuilt for a spare. If your going to use it as a spare, get a new or rebuilt one so your car is still on the road. Thats my take, cannot think of anything else it could or would be. OK members, any other suggestions?
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