Originally Posted by TrueWildMan
Intermitten SES and acceleration stumble sounds like to me a bad cat. Has she had that checked?
No.. she'* not too much car savvy.. I was thinking possible O2 sensor, but never asked her how her mileage has been as she does most of her driving in the city which wouldn't be consistant.
It might be a possible cat.. but I always assumed that with a clogged cat, it would push the engine temp higher cause the hot air isn't being released out fast enough ( and if it is, she'll have to change it quick cause it will burn out her exhaust valve quickly that way)