Catalytic converters
Thread Starter
3rd Gear
Joined: Jun 2010
Posts: 3
Likes: 0
From: The Villages Florida
Catalytic converters
I have a 2011 Grand Sport convertible standard shift with 20K miles. I have noticed a very strong smell, like something burning, after I have reved the engine a few times and then accelerate from a standing start. I have immediately pulled over and checked the car out but cannot determine what is causing the odor. I suspect it is the catalytic converters. After running the car ofr a while and pulling into my garage, I notice the smell again but not as strong. Dealers are no help. I further understand that there is a recall to replace the converters on 2006-7 models.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
there isn't a recall or special policy on cat converters related to C6 at this point. Odors are tough to diagnose. OBDII is supposed to pick up any condition that would cause car to fail emission test, kill cat converter, or converter failure. My only suggestions are: 1) Visual inspection for any leaks 2)something contacting exhaust or something else that is hot. 3)staining indicating chemical or debris on something hot. You could also check condition of diff and trans fluids for odor indicating overheated fluid.
Last edited by Kevova; Jan 13, 2016 at 05:05 PM.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Recent oil change? If you used a shop, perhaps they slopped some oil on the engine while refilling.
Make sure no hoses have moved and are next to the exhaust manifolds where they can melt.
Check the engine for oil leaks. Feel around the intake manifold and look under the car.
Verify the dipstick is fully seated. If not, you can get some crankcase fumes in the car.
Make sure no hoses have moved and are next to the exhaust manifolds where they can melt.
Check the engine for oil leaks. Feel around the intake manifold and look under the car.
Verify the dipstick is fully seated. If not, you can get some crankcase fumes in the car.
Burning Brakes
Joined: Mar 2012
Posts: 836
Likes: 43
From: Killeen Texas
Since it's a 2011, if you haven't already; I recommend fluid change of all the operating systems. (Amsoil Signature Series) The Transmission, rear diff, brakes, clutch, Power Steering, Coolant & engine...It can't hurt to have the highest quality synthetic fluids in it...just for good measure.
