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Thread: What's Causing My Cylinder Imbalance, Lean Codes, and fluctuating AFR?

  1. 01-08-2020 #1
    John_C
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    Thumbs down What's Causing My Cylinder Imbalance, Lean Codes, and fluctuating AFR?

    I can't figure this issue out.

    Recently I started seeing one of my widebands fluctuating AFR at idle and off a little compared to the other bank when I'm on the throttle.

    I now have OBD2 codes for Cylinder Imbalance, lean codes and insufficient fuel flow code.

    P0171
    P0174
    P219A
    P219B
    P2635

    The FPCM is re-flashed for the ZL1 pump. I have a DSX flex fuel sensot kit and DSX auxiliary pump that kicks on at 4psi. I also have ID1300x injectors.

    The car is a ProCharged 2010 Camaro SS A6 and has seen up to about 14psi boost at 6,800 rpm's but usually I see it in the 13psi range peak in this cold weather.

    MILs2.png

    Log Layout:
    Layout_01_06_20.Layout.xml

    Log Channels
    Channels_01_06_20.Channels.xml

    Can't get the logs to upload here, but here they are linked to my forum: http://streetntrack.net/topic/2768-2...arger-d1x-tune

    Scroll down and you'll see the files....

    Mods:

    Kooks Ceramic Coated Signature Series 1-3/4 to 1-7/8 Stepped Headers Part #22502300
    Kooks full 3in exhaust with race cats Part #22505201 (Currently with Off Road Catless Pipes)
    Trick Flow GenX 255's #TFS-3261T004-C01 (With Polished PAC .660's and Ti-Retainers)
    Texas Speed VVT 3.2 cam kit & DOD Delete with Comp Cams VCT Limiter
    Texas Speed 1.72:1 Ratio LS3 Steel Roller Rocker Arm Set w/ Roller Tip
    AEM X-Series OBDII Wideband Gauges (PN#30-0333)
    Fuel Injector Clinic ID1300x Injectors
    GM Camaro ZL1 High Output Fuel Pump
    DSX Tuning Flex Fuel Kit + E85
    DSX Tuning Auxiliary Fuel Pump Kit
    Mighty Mouse Camaro 5 Wild w/-12an and Billet Black
    Holley Tall LS Valve Covers
    JRE 6L80E Trans Dipstick kit
    Tim King Built Stage II 1,000 HP CTSV 6L90E transmission
    EARLS ULTRAPRO OIL COOLER PART# FP820ERL
    EARLS OIL COOLER MOUNTING BRACKETS PART# 800ERL
    EARLS oil cooler lines and -an fittings
    Bowler 6L80-E / 6L90-E Transmission Cooler Manifold
    DSS 3.5" aluminum driveshaft
    BMR Driveshaft Safety Loop - Black Hammertone PN# DSL015
    Circle D 6L90 LS Pro Series Stage III 258mm 3B 3200-3400
    NGK Iridium IX spark plugs #7 heat range
    DBR tuned via HP Tuners VCM Suite
    Stage II ProCharger D1X with 3.9? pulley making 14psi
    2010 Camaro SS 781rwhp
    TKR Stage 4 CTSV 6L90
    Circle D 258mm 3400 3B Pro Series Multi Disk
    Kooks Ceramic LT's & full 3in exhaust
    TFS GenX 255's (Polished PAC .660's and Ti-Retainers)
    TSP VVT 3.2 cam
    Smith Bro's trunnion kit
    AEM X-Series OBDII Wideband Gauges
    FIC ID1300x Injectors
    ZL1 Fuel Pump
    DSX Flex Fuel Kit / Auxiliary Fuel Pump Kit
    MM Camaro 5 Wild
    Holley Tall LS Valve Covers
    NGK Iridium IX #7
    HP Tuners MPVI2+
    ProCharger D1X @ 13psi
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  2. 04-10-2022 #2
    John_C
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    Figured it out a while back. Shop installed wrong length pushrods that ended up breaking the back side off a couple rocker arms and did heavy wear on the others.
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