Date registered: May 2014
Vehicle: 2010 glk350 91 560sec 74 230 66 220seb 86 300e 88 300e
Location: nor cal
Mentioned: 1 Post(s)
Quoted: 203 Post(s)
Sounds like your engine might be getting to much fuel. Check fuel mix and oxygen sensor.If you still suspect exhaust being restricted put a vacuum gauge on engine if you have less that 15 inches of vac after engine runs for five minutes then it may be possible. Cats dont go bad by them self it takes to much fuel or to much oil to kill them. I have a 300e with over 380000 miles on it and still has the original cat. It still passes california smog without any trouble
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2010 glk350-86 300e-88 300e white-66 220seb-74 230- 2012 chevy cruze eco wifes commutor 40plus mpg on regular. 1970 gmc 2500- 2002 gmc 2500hd duramax/allison-50s something willeys pickup-74 harley fxe-92 harley flhtcu ultra classic-2017 harley road glide special- 2018 road glide special-98 special construction harley powered.-