Hey all,
I was wondering why my 97 seemed to be running hotter than my 01. While I still haven't figured it all out, I found that the gauge display on each are "calibrated" differently. The signal goes from the sending to the PCM which in turn tells the dash gauge what to display.
I believe they are designed to show a warm up cycle and then show an hot/overheat condition rather than true temperature.
As an example, my 01 XJ seems to show warm up accurately figuring 27.5 degrees per hash mark between 100-210F. However, at 221F it is still hanging on the 210F hash mark.
My 97 XJ will show 208-212F as the right side of the hash mark and 218-223 as 3/4 of the way to the hash mark after 210F.
These temp readings are from an ODBII reader connected while driving.
It does seem that the 97 runs a few degrees warmer, say 207-208 when the 01 runs 199-203. However, even that difference could be from a sending unit. The 97 may have "warmed up" a few degrees with a new sender while the 01 still has its factory sending unit.
I was wondering why my 97 seemed to be running hotter than my 01. While I still haven't figured it all out, I found that the gauge display on each are "calibrated" differently. The signal goes from the sending to the PCM which in turn tells the dash gauge what to display.
I believe they are designed to show a warm up cycle and then show an hot/overheat condition rather than true temperature.
As an example, my 01 XJ seems to show warm up accurately figuring 27.5 degrees per hash mark between 100-210F. However, at 221F it is still hanging on the 210F hash mark.
My 97 XJ will show 208-212F as the right side of the hash mark and 218-223 as 3/4 of the way to the hash mark after 210F.
These temp readings are from an ODBII reader connected while driving.
It does seem that the 97 runs a few degrees warmer, say 207-208 when the 01 runs 199-203. However, even that difference could be from a sending unit. The 97 may have "warmed up" a few degrees with a new sender while the 01 still has its factory sending unit.
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