986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Different Smell from Hot Engine

brybart · 01-19-2022, 04:47 PM

I recently had CEL for drivers side air sensors, they were not persistent, but periodic, cleared them with Duratec. I have replaced all the sensors about 5 years ago. I cleaned the MAF (which was dirty) and have not seen codes for a while. But I have noticed a different smell after driving the Boxster S plus a new noise at idle

I do have an unsteady idle before the engine warms up - car seems to have normal power it is not running hot.

One time I had cats go bad it was on my mustang - no power, engine ran HOT

I had the cats go bad on my land rover but that they were just falling apart on the inside made noise at idle

Any thoughts here - Car has 103,000 miles and is tracked once in a while - do the cats rattle on Boxsters?

01-19-2022, 04:47 PM	#1
brybart Registered User Join Date: Nov 2016 Location: Bay Area, CA Posts: 36	Different Smell from Hot Engine - Cats? I recently had CEL for drivers side air sensors, they were not persistent, but periodic, cleared them with Duratec. I have replaced all the sensors about 5 years ago. I cleaned the MAF (which was dirty) and have not seen codes for a while. But I have noticed a different smell after driving the Boxster S plus a new noise at idle I do have an unsteady idle before the engine warms up - car seems to have normal power it is not running hot. One time I had cats go bad it was on my mustang - no power, engine ran HOT I had the cats go bad on my land rover but that they were just falling apart on the inside made noise at idle Any thoughts here - Car has 103,000 miles and is tracked once in a while - do the cats rattle on Boxsters?