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Thread: Another LSX Starts, Then Dies

  1. #1

    Default Another LSX Starts, Then Dies

    LSX not staying running. LSX will start then die maybe 5 to 10 secs after start. Installed new cam & crank position sensors still does the same thing.
    Custom Ignition Settings as follows:
    Crank - 24x
    Inductive Delay - 1.0 usec
    Timing Offset - 0°
    Cam Sensor - Single Pulse
    Sensor Type - Digital Falling
    Output Setup
    Type - Coil On Plug
    Dwell Time - 5.0 msec

    I see crank & cam signal in the System Logs. Not sure what the problem could be. Attached is the System Log:
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    1987 Monte Carlo SS - LSX BW S475 Turbo Holley HiRam HP ECU
    2004 Subaru WRX STI - Built - HTA3586- Built - Daily Driver - 600whp 93 Octane
    1996 Impala SS Lingenfelter LT4 - T56 - Powerdyne SC
    1995 S10 ZR2 Lifted - LT1 Swapped
    2007 Xterra Offroad - Stock

  2. #2

    Default

    Reading through some info on this sight. I used a LS1 base calibration that was not setup for forced induction, I.E. 3 bar base calibration. I modified that map with the 3 bar ZR1 Map. Would that cause the issue?
    1987 Monte Carlo SS - LSX BW S475 Turbo Holley HiRam HP ECU
    2004 Subaru WRX STI - Built - HTA3586- Built - Daily Driver - 600whp 93 Octane
    1996 Impala SS Lingenfelter LT4 - T56 - Powerdyne SC
    1995 S10 ZR2 Lifted - LT1 Swapped
    2007 Xterra Offroad - Stock

  3. #3
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    23,113

    Default

    Quote Originally Posted by obrut View Post
    I used a LS1 base calibration that was not setup for forced induction, I.E. 3 bar base calibration.
    Yes, the base calibration you start with, must correspond to the MAP sensor you're using:
    For example, you can't use a naturally aspirated base calibration for a forced induction engine.
    This is because the 2,3,5 bar MAP sensor selection only changes the kPa load Y-axis, but not the Base Fuel Table lb/hr
    values (creating an excessively lean map) or the Base Timing Table degree values (excessively advanced timing map).
    You must choose a 2,3,5 bar base calibration or reconfigure your existing Global Folder's Fuel & Timing Tables accordingly.
    http://forums.holley.com/showthread....8687#post48687 (Initial Checks & Adjustments)

    I modified that map with the 3 bar ZR1 Map. Would that cause the issue?
    "Map" as in MAP sensor, or base calibration map? If all you did was change the MAP sensor (in Sensors ICF), then it's still wrong.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  4. #4

    Default

    So I created a new Global Folder with all the corresponding calibrations. Have not had a chance yet to try it. I will post up if it works or not. Thanks for the quick response.
    1987 Monte Carlo SS - LSX BW S475 Turbo Holley HiRam HP ECU
    2004 Subaru WRX STI - Built - HTA3586- Built - Daily Driver - 600whp 93 Octane
    1996 Impala SS Lingenfelter LT4 - T56 - Powerdyne SC
    1995 S10 ZR2 Lifted - LT1 Swapped
    2007 Xterra Offroad - Stock

  5. #5
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    23,113

    Default

    Quote Originally Posted by obrut View Post
    So I created a new Global Folder with all the corresponding calibrations.
    It should be able to idle with 7-10 lbs/hr of fuel (gasoline). Also, ensure it's idling with enough airflow.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  6. #6
    Join Date
    Nov 2013
    Location
    Chicago IL
    Posts
    1,952

    Default

    Make sure you have closed loop enabled (not necessarily Learning).
    Closed loop will try to compensate for fueling, if your Fuel Table is not correct.

    Likely, you have enough to crank & start, then After Start Enrichment kicks in.
    As it decays, it suddenly doesn't have enough fuel to run well, and it dies when it finally goes too lean to run.

    Try upping the values in your VE Table by 5% at a time, till it runs on its own after the After Start Enrichment decays.

    Also, make sure you have the throttle set correctly...if the throttle isn't open enough, it won't have enough air to idle.
    When you start the car, the IAC will go to the value set in the Idle screen, and will decay...as it goes down, if you don't have enough air, it will also die.
    Once you get the engine hot, you can set the TB (by adjusting the set screw on it) so that the IAC only opens 5%-10%, and it should idle better as it will have enough air coming in to begin with.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  7. #7

    Default

    So my issue was the map. Using a base calibration not setup for boost (I.E. MAP sensor) was the issue - post #3. Created the new Global Folder, and she fired right up. Thanks for the help!
    1987 Monte Carlo SS - LSX BW S475 Turbo Holley HiRam HP ECU
    2004 Subaru WRX STI - Built - HTA3586- Built - Daily Driver - 600whp 93 Octane
    1996 Impala SS Lingenfelter LT4 - T56 - Powerdyne SC
    1995 S10 ZR2 Lifted - LT1 Swapped
    2007 Xterra Offroad - Stock

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