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New ses codes

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  1. #1
    Member Justin93's Avatar
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    2002 CAMARO Z-28 M-6

    New ses codes

    Ok I got my last codes fixed by changing the knock sensor harness and the intake gasket, I now have P0171 and P0174
    Ive searched for vacum leaks and nothing, I have a Stock MAF, My plugs and wires are only 3 months old, Please help Im at a loss!!!

    My mods are as Follows, K&N FIPK, Kooks Long tubes, Texas Speed ypiped and Catback, Ported TB from TPIS,Crane Plug wires, NGK TR55 Iridium plugs, LS6 PCV conversion, and Thunder Racing Catch Can

    Below is my Freeze Frame Data!
    Year: 2002
    Make: Chevrolet
    Model: Camaro Z-28
    Engine:5.7L SFI
    VIN:
    License:
    Mileage:

    Stored:
    P0171 System Too Lean (Bank 1)

    Pending:
    P0171 System Too Lean (Bank 1)
    P0174 System Too Lean (Bank 2)

    MIL ON
    Misfire Monitoring Complete
    Fuel System Monitoring Complete
    Comprehensive Component Monitoring Complete
    Catalyst Monitoring Complete
    Heated Catalyst Monitoring Not Supported
    Evaporative System Monitoring Not Complete
    Secondary Air System Monitoring Complete
    A/C System Refrigerant Monitoring Not Supported
    Oxygen Sensor Monitoring Not Complete
    Oxygen Sensor Heater Monitoring Not Complete
    EGR System Monitor Not Supported

    DTC For Which Freeze Frame Was Stored P0171
    Fuel System 1 Status Closed Loop
    Fuel System 2 Status Closed Loop
    Calculated LOAD Value 3.92 %
    Engine Coolant Temp 195.8 F
    Short Term Fuel Trim-Bank 1 15.63 %
    Long Term Fuel Trim-Bank 1 25.00 %
    Short Term Fuel Trim-Bank 2 16.41 %
    Long Term Fuel Trim-Bank 2 25.00 %
    Fuel Rail Pressure 13.3 inHg
    Engine RPM 1029.25 rpm
    Vehicle Speed Sensor 8.1 mph
    Air Flow Rate from Mass Air Flow Sensor 1.548 lb/min
    Absolute Throttle Position 5.10 %

  2. #2
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    I'd go over everything on the intake R&R again, probably not fuel or 02 related if you didn't have them before. If you need step by step diagnostics for them see www.gearchatter.com/viewtopic9369.php Both banks lean at the same time is probably a vacuum leak or unmetered air somewhere, so you're on the right track.
    Last edited by 2001NBMZ28; 10-05-2008 at 04:20 PM.

  3. #3
    Member Justin93's Avatar
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    2002 CAMARO Z-28 M-6

    do you think I should replace the 0 rings on the injectors? I did remove the fuel rails off the intake when I changed over to the LS6 valley cover.

  4. #4
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    Could a Fitting on the catch can being a bit too loose cause unmetered air to enter the system?

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    O rings should be OK, not familiar on catch can setups but part of the diagnostics says to check the PCV valve/system. If it was loose I'd tighten it then clear the codes and see what happens.

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    I solved the problem, It turned out that the catch can was letting too much crank air into the intake manifold causing the lean code to pop up. I put my stock pcv valve in right after the out line on the catch can and boom problem solved, gave me enough restriction!!!! car idles great, shifts great, and flat out hauls ass!!!!! Thanks for the help guys!

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    Glad it was something easy.

  8. #8
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    Quote Originally Posted by 2001NBMZ28 View Post
    Glad it was something easy.
    me too!

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