Bad cat symptoms?
I've noticed what seems to be an excess amount of heat coming from the drivers side floorboard area when I'm driving around. I don't know if the passenger side floorboard area is seeing the same kind of heat since I never ride on that side. I've assumed for the longest that it was just the tranny causing that until I was under the truck today and noticed the cats are directly underneath the front floorboards. The heat has been noticeable for around a year or so.
My gas mileage seems a bitworse than normal, but I haven't tracked it well enough to say for sure. I don't drive the truck frequently enough to make an accurate assessment - when I do drive the truck there is one of three different trailers behind it so the gas mileage varies pretty substantially.
I've also noticed a high pitched whine/whistle coming from underneath the truck in that general area for the last year or so - not sure if it has anything to do with the cats though.
Truck has 114k miles on it and had some terrible fuel system issues for quite a while that have now been worked out (replacement of fuel injectors, o2 sensors, fuel tank, fuel filter, and fuel pump).
What exactly are the tell-tale signs of the cats getting clogged or going bad?
Last edited by south_ms_sprcru; 07-02-2011 at 11:37 PM.