I tried using my new ultragauge scan tool on my 95 XJ6. It worked great on my 2000 XK8 so I expected the same on the XJ. Not so lucky. On the first page that I have set up has engine coolant and inlet tempt. They read OK. I also have MPG and Gal per hr. They are way off like 4,000 mpg and gph almost zero. What could be wrong? Any ideas?

EZDriver

 

For those interested the problem has been solved. Actually there was no porblem just a matter of a decimal point. On the XJ6 (X300) the measurement of the mass airflow sensor is different by a factor of 100 as compared to other cars of later ventage. The MAF is used to compute fuel flow and is normally in grams per second. On the X300 it must be in increments of 100 grams per second. I ran a test using the Ultragauge on both my XK8 and my XJ6. Nice to have one of each. At the same speed the MAF, mpg and gph were different by exactly 100.

EZDriver