My car got louder about 2 years ago when possibly a bit of dirt got into the injector area while changing the O-rings. Despite everything being cleaned with molly lube and having the injectors taken out and cleaned, it has always seemed louder than it should be. It'd be interesting to see how loud this car was when brand new so I'd have something to compare it to. Maybe it's as quiet as it should be.

All my 3 of my filters are clean, the pre-filter, filter, and tank filter.

I read some threads where people got new injectors and in some cases it helped and others it didn't, meaning their injectors didn't have a problem after all. Have new injectors helped any of your cars to be more quiet?

jeff 1991 300d 230k