Understand what your tools are telling you
Don't make this mistake
Smoke testing for codes P0171 P0174
These two codes mean a V style engine is running lean on both banks. So you have to be thinking - what can make both banks run lean. Here's how to make this task simple with a smoke machine.
Head leak test HD version
Head leak test
Focus T-stat housing
A common problem with Focus coolant leaks is the thermostat housing cracking. Just changing the thermostat won't fix it. You have to change the housing as well. Here's how to do it.