i pulled my o2 sensor ut about a week ago and she's white. like shes running very lean but what can cause this-- clogged cat ?

 

i think white would be more an indicator of heat not lean. a clogged cat would be glowing red, or close to it if it were clogged. have you connected a DVM to the o2 wire and took any readings

 

ok i dunno what a DVM is, so can you please explain--

and i pluuged it ut when she was cold and 1st thing in the morning.

 

Certain types of RTV sealants will do this if they don't specify oxygen sensor safe on the tube. Yes, restriction in the exhaust, especially a partially clogged cat can do it but generally if it get's to that point you will notice a definite lack of power. I have seen many come out of perfectly running engines look towards white. I agree with the Mod, look to see what F/A ratio is. If you have a Chilton manual they tell you how you can jump the ALDL connector with the engine running and the frequency of the SES light flashing will tell you whether it's on the rich or lean side. Try any fuel additives? They can do it also. Lot's of things can cause a lean condition, air leak in the intake for example. Don't overlook the sensor itself, if it has not been replaced or has a lot of time they tend to get "lazy". The sensor itself may be not responding correctly and causing a lean condition. My 99 S-10 had around 50k and I changed the O2 and what a difference it made in fuel economy. No codes or performance problems other than gas mileage got a little crappy.