John Von Vleck
Freshman Member
Offline
Hello--Could use some info
I have owned a 1987 XJS V12 for 2 years--Was
getting 15-17MPG--NOW I AM ONLY GETTING 8MPG!!
COULD A SIMPLE(MAJOR)TUNEUP SOLVE THIS PROBLEM??
It is not running bad, though it could use more
power. WHAT SHOULD I CHECK?? Your ideas would
be greatly appreciated.
I have owned a 1987 XJS V12 for 2 years--Was
getting 15-17MPG--NOW I AM ONLY GETTING 8MPG!!
COULD A SIMPLE(MAJOR)TUNEUP SOLVE THIS PROBLEM??
It is not running bad, though it could use more
power. WHAT SHOULD I CHECK?? Your ideas would
be greatly appreciated.