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Dan
Dan, Technician
Category: Car
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Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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2002 ford focus 2.0 l engine misfire on #2 code reads p00302.changed

Resolved Question:

2002 ford focus 2.0 l engine misfire on #2 code reads p00302.changed plugs and wires still misfire code p00302.could it be injector?
Submitted: 7 years ago.
Category: Car
Expert:  Dan replied 7 years ago.

You could try to swap an injector with another cylinder to see if misfire moves, if so replace injector. You can also do a compression test to verify compression in that cylinder in not low, if so you have internal engine problem. It is common for the exhaust valve in this vehicle to stick causing this code, you could try to run some top engine cleaner through engine to try and remove any carbon buildup and add valve lubrication additive. If none of these things work you will need to bring vehicle in to have valves looked at. Let me know if there is anything else I can do to help. Thanks.

 

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P0302 Cylinder Number 2 Misfire Detected

Possible CausesSetting Conditions
  • Base engine mechanical problem that affects only Cylinder 2
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the EGR system and in its related hoses and/or valve
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel delivery problem (e.g., a contaminated, dirty or sticking fuel injector)
  • Ignition system problem (coil, plug) that affects only Cylinder 2
  • Vehicle driven while very low on fuel (less than 1/8 of a tank)

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