 My engine light came on at 93K miles.I took it to the dealer they said they had to replace the catalytic convertor that cost me about 1K dollars.Within a week Im driving down the road and loose power.I cant go any faster than 20 or so mph and my engine light never even comes on. I should have marked my cat because it sounds like to me they never replaced it.How can a new cat fowl out that quick?Even if I was burning pure oil it would take longer than that to get blocked.