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Thread: LSx Cranks & Runs For A Second

  1. #11

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    I've had them do exactly what you are saying. One was too lean to run, and another, the throttle blades weren't open far enough after startup. My guess is it's lean in your idle cells. Enrich them up until it will start running.

  2. #12

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    So AFR goes to 7 when it starts.

  3. #13
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    That could just be a very rich startup (because it's untuned). Try leaning the Base Fuel Table in that starting area, and see if it continues to run.
    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. #14

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    Leaned all tables up to 14 AFR cranking, no bueno.

  5. #15
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    Quote Originally Posted by ghost-1 View Post
    Leaned all tables up to 14 AFR cranking, no bueno.
    Which EFI tables are you referring to? How many lbs/hr of fuel is in the idle area of the Base Fuel Table?
    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. #16

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    The Base Fuel Table is 1.2 lbs/hr.

  7. #17
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    Quote Originally Posted by ghost-1 View Post
    The Base Fuel Table is 1.2 lbs/hr.
    No, your engine won't run on 1.2 lbs/hr of fuel! Where is this 1.2 lbs/hr of fuel (RPM & kPa)? Increase the entire idle area of the Base Fuel Table to 9 lbs/hr. Also, what's the TPS Position at key-on, engine off?
    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.

  8. #18

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    I did raise it and it actually took some throttle input before dying, and the AFR was around 11-13. The TPS is 0%, key-on, engine-off.

  9. #19
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    If you're using V4, in your Base Fuel Table, click the "Conversion" check box (this converts all the values to a VE value temporarily),
    then enter 80 in all cells from 0-2000 RPM.
    Enter 90 in all cells 2000-3000 RPM.
    Enter 100 in all cells 3000 RPM on up.

    Then uncheck the "Conversion" box.

    This will get you in a somewhat sort of closer fuel map than wherever the hell you are at right now, which, from what you just told us, seems to be quite a ways off.
    Last edited by S2H; 02-27-2016 at 09:44 AM.
    -Scott
    Don't forget to check out progress on my Race Car:
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  10. #20
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    Quote Originally Posted by S2H View Post
    ...click the "Conversion" check box (this converts all the values to a VE value temporarily), then enter 80 in all cells from 0-2000 RPM.
    Ghost-1, if that's too rich in the idle area, try 40% VE Table Conversion value. (Your camshaft will idle around 850 RPM & 58 kPa.)
    Also, are the Air Temperature Enrichment or Coolant Temperature Enrichment Modifiers erroneously set to 0% or 70%, instead of 100%?
    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.

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