Ammonia smell from exhaust

Silverfin
Sun, 08 Apr 2012 16:36:38 +0000
Maintenance/Repairs

I drive a 2007 Toyota 4Runner. Recently the weather has been nice enough to drive with the windows open. I’ve noticed a very strong ammonia smell from the exhaust - so strong at times, that I have to roll up the windows and use the a/c. I use Shell gas with no ethanol, but it has a nitrogen additive. Is it the gas I’m using, or is there something wrong with the vehicle? It’s definitely ammonia, and I can only smell it while I’m driving.

15 posts - 13 participants