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I went to a auto store and they ran a diagnostic because the service engine light was on. The reading said that there is an start-up misfire??? What does this mean please?
 

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Was it this one?

DTC Code P0316

DTC Code: P0316 Description: Misfire Detected On Startup (First 1000 Revolutions) Probable Causes:
  1. Update control unit software - Check for the latest control unit update
  2. Powertrain or Engine Control Module faulty
  3. Fuel pressure - Pump, regulator, filter or lines
  4. Fuel injector(s) faulty
  5. Ignition system - Ignition module, coil, spark plugs and wires
  6. Fuel system
If so, start with the easy stuff and make sure you have spark and then move up.
 

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It is a chain.

Mac
 

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Last time I did a fluid/filter change I used Advance Auto Parts DEX III/M and haven't had any issues at all.
 
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