I had the usual gargling problem from the AIV filter boxes.The reed valves that are supposed to allow air to flow into the exhaust but block exhaust gases flowing back the other way were leaking causing a lot of noise from the area under the wheelarch.

 

I found that by simply disconnecting the plug to the AIV control solenoid under the bonnet the vacuum going down to the AIV valve block assembly is cut off and all AIV flow is stopped.Result,no more gargling (once the water is drained) and no more exhaust backflow.

 

Hopefully this is an easier solution than removing all the AIV stuff.

Thanks Krooz.....but I did this job YESTERDAY!!!!!

 

DAMN

 

Chris Davies

To be honest I don't find the AIV removal that much of a hassle, and I tend to go further than the accepted write up by removing the plastic tanks around the indicator and the solenoid. But I do like ripping stuff out my car :):)