How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask James Your Own Question
James, Ford Technician
Category: Ford
Satisfied Customers: 3545
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
Type Your Ford Question Here...
James is online now
A new question is answered every 9 seconds

f350: Truck running very rough. Code for p0272 and p0284 cylinder

This answer was rated:

Truck running very rough. Code for p0272 and p0284 cylinder 4 and 8 contribution faults. How do i diagnose if it is for sure injectors?
Typically if the FICM voltage is ok and the engine has good compression then it is injectors. If there are only contribution and no other injector circuit codes then more then likely you will need injectors. You can perform a manual compression test by removing the glow plugs.
James and 3 other Ford Specialists are ready to help you