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Thread: P0174 Issue, 09 G8 GT

  1. #11
    Moderator, Retired -Ray-'s Avatar
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    Yeah, sell it. Buy someone else's problem. That could be easier to fix.
    Rest in Peace Charlie!

    BMR, Brembo, Circle D, Comp Cams, Crazy Paul's Holden parts,
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    Just a GT


    Quote Originally Posted by RichsGreyGT View Post
    this site is hardcore modding central.

  2. #12
    VIP Member STL_G8GT's Avatar
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    I hadn't considered that. That's actually quite reasonable. :-)
    Quote Originally Posted by -Ray- View Post
    Yeah, sell it. Buy someone else's problem. That could be easier to fix.
    2009 PBM G8 GT
    Pat G 218/226, ARP Bits, DSteck/Shane Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 catted/Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID850 injectors
    Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
    TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
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    Originally Posted by TonyKarter
    Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
    RIP Charlie - GRRRR8
    RIP Chris Wells - Panzer Leader

  3. #13
    VIP Member STL_G8GT's Avatar
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    Wire traced the fuel injector and coil for cylinder #2. No issues, no shorts that I could find.

    Slightly raised idle fuel pressure.

    Replaced bank2 header gasket.

    Visually watched valve train during crank to see all rockers/springs/valves moving. They were.


    No change. Bank2 climbs lean at idle.
    Last edited by STL_G8GT; Today at 05:23 AM.
    2009 PBM G8 GT
    Pat G 218/226, ARP Bits, DSteck/Shane Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 catted/Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID850 injectors
    Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
    TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
    Gloss Black Valve Covers, 6k HID, V6 Handles, Interior/License Plate LEDs, Debadged, Holden Black Trim, Polk Dxi, GXP diffusor, a few bits from Crazy Paul

    Originally Posted by TonyKarter
    Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
    RIP Charlie - GRRRR8
    RIP Chris Wells - Panzer Leader

  4. #14
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    Something in the tune?
    09 G8 GT in Stryker Blue

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  5. #15
    VIP Member STL_G8GT's Avatar
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    Quote Originally Posted by wyome View Post
    Something in the tune?
    I really don't think so, but that's not my forte. The tuner didn't see anything initially that is jumping out at him, but it's all remote, which is tough.

    He suggested maybe swapping the valve springs on that lazy cylinder with ones from another bank. I'm going to give that a shot at some point, but honestly I would think a valve spring issue would show up at higher rpm, not at idle.

    I went back and looked at the oldest log I have, from 2013. I had a +5 differential on Bank2 vs Bank1 at idle. I wasn't able to view a log to see if that number climbed over time, however after acceleration or deceleration and then idle (such as at a stop sign), the fuel trims drop to B1:0/B2:+5.

    This is consistent with the idle performance today, a +5 differential on Bank2.
    Last edited by STL_G8GT; Today at 06:36 AM.
    2009 PBM G8 GT
    Pat G 218/226, ARP Bits, DSteck/Shane Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 catted/Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID850 injectors
    Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
    TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
    Gloss Black Valve Covers, 6k HID, V6 Handles, Interior/License Plate LEDs, Debadged, Holden Black Trim, Polk Dxi, GXP diffusor, a few bits from Crazy Paul

    Originally Posted by TonyKarter
    Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
    RIP Charlie - GRRRR8
    RIP Chris Wells - Panzer Leader

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