DTC P303 & P316

2003 FORD FOCUS
89,000 MILES • 2.3L • 4 CYL • FWD • AUTOMATIC
Avatar
RANDY SHARP
  • MEMBER
  • 165 POSTS
I have a high energy ignition adjustable spark plug tester. What I want to know is where on the voltage scale should I set it? On the voltage scale it has 20, 30, 40 this is to test coil on plugs. I would appreciate it I tested them, but I know I had it to low I had it way down on 20, Thank You.
Mar 6, 2016 at 12:59 AM
Advertisement
Avatar
WRENCHTECH
  • CERTIFIED EXPERT
  • 20,761 POSTS
A healthy system should be able to jump the 30K gap, but it should at the least jump 20K.
Mar 6, 2016 at 5:40 AM