I've read alot of threads and see that there are some really smart guys here.
ok, here is my prob. my caddy seems to have a stuffy feel to it. like when im on the highway to maintain a 65mph speed my rpms are at like 2100.(is this normal)
when i first start the car it idles at around 1500 then it drops down to about 675. if i put the pedal to the metal the car picks up speed but it feels like it has to try real hard like it wants to but it really can't. sorry this isnt really technical but im far from a mech.

i checked the codes and i have one but thatsfor keyless entry.
when should my thermastat open (at what temp?)



HELP ME PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!