Q: How to diagnose a fan clutch?

asked by on August 18, 2016

My truck on Expressway just gets only t 40 or60 miles per hour.in winter time with engine off fan clutch truck is operating, which means my truck last to long to warm up.truck sounds roughly also,truck consume to much gasoline as well,. theres another thing, my power steering switch is broken also,i know this detective switch causes poor engine performance (power steering switch).and i would like more especificaciones información to diagnose fan clutch,how to diagnose this engine cooling problem,this poor engine performance,this excessive gas consumption, etc, please help me up with some información. thanks

My car has 140000 miles.
My car has an automatic transmission.

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