P0303 Ford - 2003 mustang

Question

I have 2003 foes mustang and started getting p0303 and p0316 code. Have replace the plugs and plug wire as well as the coil pack and it hasn't helped. What should I try next?

Answer 1

P0303 Misfire number 3 cylinder

P031616 Misfire detection

Check the firing order, If you have a misfire on the number 3 cylinder you would not need to have a P0316

 Recheck the firing order for the ignition coil pack

Here the firing order, if the firing order s correct and the sparkplug is good, and so is the sparkplug wire , move the fuel injector

 Ford uses a locking tab on the fuel injector check and make sure it connection is seated, and does not easily pop out, There bee alot of misfire condition where the tab where not properly seating causing a misfire condition.

 If it is not properly secure zip tie it , this goes with the other injector connection.