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Revisiting a CEL issue..

Discussion in '7th Generation Honda Civic (2001-2005)' started by RayES2, Oct 28, 2017.



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  1. RayES2

    RayES2 New Member

    Joined:
    May 5, 2014
    Messages:
    4
    Location:
    Germantown, MD
    I have an ES2 with a D17A2 with a CEL and rough running issue.
    Replaced the following so far per regular maintenance; all items are less than 5 months old:
    Coils (DENSO)
    Plugs (NGK)
    A/f ratio sensor (DENSO)
    02 sensor (NTK)
    EGR Valve with new gasket
    Cleaned EGR Passages
    Inspected for vacuum leaks
    Inspected injectors; no clogs, clean and like new spray pattern
    changed thermostat and did a coolant flush
    did valve cover gasket with spark plug tube seals and cam plug
    both injector base and plenum gasket were done with t/b gasket

    Compression and leakdown tests show no failure of piston rings and head gasket, compression was 200 in every cylinder from what the tech told me. Tech found no leaks.

    codes are p0300, p0301, p0302,p0303 and p0304.

    anyone else able to chime in and give me an idea what it may be?
     
  2. boofoo

    boofoo Respected Registered VIP

    Joined:
    Oct 15, 2016
    Messages:
    2,223
    Location:
    United States
    Is the fuel in the tank very old?

    Have you measured the fuel pressure?
     
  3. RayES2

    RayES2 New Member

    Joined:
    May 5, 2014
    Messages:
    4
    Location:
    Germantown, MD
    Fuel is always fresh and fuel pressure is good. I'm beyond baffled by this point, really.
     
  4. boofoo

    boofoo Respected Registered VIP

    Joined:
    Oct 15, 2016
    Messages:
    2,223
    Location:
    United States
    How did you measure the fuel pressure and what were the numbers?

    pic_2.jpg

    pic_1.jpg
     
    Last edited: Oct 29, 2017
  5. Youngsoulja2

    Youngsoulja2 New Member

    Joined:
    Sunday
    Messages:
    11
    Location:
    WarsawIndiana
    Your Catalytic Converter could be bad.
     


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