Port IAC alarm still going off even after replacement

[Calm Crews]

I have a 2006 340. The IAC alarm went off on the port side, also it was doing the usual, not being able to idle without dying. I replaced the IAC and the idling is back to normal but the alarm continues to go off. I have reset the guardian a few time along with shut the power off on the batteries for a week to reset the computers on the computer. Still comes on. Any idea on what my next step should be?

 

[Motoguy2158]

Did you replace the Iac Muffler in the throttle body and make sure the port is clear. Sometimes the old mufflers get sucked in to the port and plug it.

 

[Calm Crews]

Did you replace the Iac Muffler in the throttle body and make sure the port is clear. Sometimes the old mufflers get sucked in to the port and plug it.

I did put in a new muffler. The old one was gone so I figured it got sucked in. I pulled the rubber hose and it was clear. So now I should pull the cover off the front and see if it’s in there?

 

[Calm Crews]

So I did look into the throttle body and there was no muffler to be found so it bust have sucked it all the way in. Anyone else have any suggestions on why the alarm would continue to go off?

 

[Motoguy2158]

From Merc fault Code List: IAC Output --- Faulty Idle Air Control (IAC) valve. Only with RPM
Check your wire connections to IAC....Other than that maybe switch IAC from port to starboard engines see if problem follows... Im out of ideas.