2000 ram 2500 24v.engine sudenly running warmer than normal and idle at 850,the norm is 800rpm.new radiator/fan clutch/temp sender/themo/intake temp sender/reman v44/no fault codes!temp goes up and down w/load,148k on engine never has run warm to this temp!! test run w/scaner and temp same as gauge.trans not slipping,could i have a over fuel problem starting to develop????? any info would help. thanks 72fj.