I use K6 JRFs air conditioning diagnostic protocol to get the supposedly accurate engine temp etc ,(Number 6 in the diagnostic mode) that I use to monitor engine in my notes, and my posts.


My 60-65 mph highway temps have been around 67-71 C here in NY area when its in the 30s outside . Then when I am driving back in the city, temps get to 85c fairly steadily. Then when I am driving with the rapid starts etc trying to diagnose a flat spot I have mentioned in another post

400 SEL BREAKING UP AROUND 1500 RPM

temps get to 103C and prolly even higher if I continued.

Somone suggested that this fluctuation in temps is not normal. The gauge on instrument cluster tracks the air conditioning display but never gets as high as fast as the ( I assume ) more accurate air conditioning display shows.

My question has 5 parts

#1 Do you think that these fluctuations are abnormal?

# 2 And if so can they affect air flow mixture sensors etc .

#3 what is the normal range for this time of year with 30 degree outside temps, and climate control on at around 69 degrees, and I assume no air conditioning being used ?

#4 What should be the highway 30 mile trip temp

#5 And what should be the city driving stop and go 45 minute trip temp

Thanks