My 1988 XJS has one main issue that threatens its existence. It overheats almost randomly. At first, I thought it was just the outdoor temperature, but today, I realized it isn’t. My initial thought was a bad radiator, but today, I drove the car and it stayed at N just fine than a couple hours later (when the weather cooled down) it was running between N and H. It seems to randomly want to overheat. My guesses are the radiator, fan clutch (fan runs at idle but no way of knowing once I am driving), or perhaps bad sensors/gauge (something electrical).
My second issue is a little more minor. My trip computer doesn’t work. It just shows 0s for my fuel, miles, gas mileage, and everything other than the time. My current fuel gauge sensor doesn’t work so that could be why, but the electronic trip meter doesn’t work either.
Ideas anyone? I’m limited on money, so if you know of ways to test things before I replace a bunch of different parts, that would be appreciated.
P.S. I haven’t shared my story with anyone other than Greg, so I want to tell the rest of you. In 1992, my grandmother bought this car. In 2004, I was born (so if you know math, I’m 16). In 2010, she parked the car after one parts car, an overheated seized engine, an engine swap, and lots of $. In 2016, she passed away from cancer. In 2019, I pulled the car out and started to work on it. I just wanted to share with all of you, so you understand why my knowledge is much more limited than yours. Thank you!