 Engine light on, friend told me about 
Head and Cylinder Gasket Problems with 
Sentra/Altimas. A little worried.  
Noticed a loss in power and rougher 
downshifting, could be due to need for 
tune up though. Brakes still tight-
good. Changed tires, still skid and 
slide under braking. Hard to change 3rd 
brake light. Speakers blew on stereo. 
Resale value extremely low, $3500. A 
fair weather friend. I try very hard 
not to drive during incliment weather.