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Thread: How does temp effeect c.l.s.d?

  1. #1
    Lifetime Member smslyguy's Avatar
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    Default How does temp effeect c.l.s.d?

    I have been running c.l.s.d. for a while now and i can't figure this one out.. In warmer temp's say like above 60 degrees my v.e. tables are spot on. When temps dip below say 50- 40 degrees my car starts to run lean.. Is there a setting somewhere that controls I.A.T. blending? LIke b4901-b4902??

    It will run in p.e mode at temps above 60 at w.o.t. 12.8, but in temps below this it starts to really lean out to around 13.2 or so.. It Here is a copy of my scan.. It will actually start slightly missing while accelarating.. I'm out of idea's...
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    2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...

    Now own a 2015 1LE camaro

  2. #2
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    I think it was A0014 in the COS.
    E85 is NOT flex fuel.

    2003 Chevy S10 4.3L LU3 LS1B Auto
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  3. #3
    Lifetime Member smslyguy's Avatar
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    any idea's at all??
    2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...

    Now own a 2015 1LE camaro

  4. #4
    Joe (Moderator) joecar's Avatar
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    Yes, nevinsb is saying that to correct this in SD you need to run a COS and edit table A0014.

    Without A0014 (only defined in the COS's) you can't correct this when in SD.

  5. #5
    Lifetime Member smslyguy's Avatar
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    So is this one of the draw backs from not running a c.o.s.?? Meaning that this is typical when running c.l.s.d. for the vehicle ro run leaner on cooler temps??
    2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...

    Now own a 2015 1LE camaro

  6. #6
    Lifetime Member BLK02WS6's Avatar
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    I've never messed with B4901, but I wouldn't think it would help much because at WOT, it is already weighted pretty heavily toward IAT. You could always try it and see if it would help, but in the end, I think your answer is like said above - go to a COS and use A0014...
    GM EFI Tuner
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  7. #7
    Lifetime Member smslyguy's Avatar
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    Does a0014 only effect o.l. or both c.l. and open loop??
    2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...

    Now own a 2015 1LE camaro

  8. #8
    Joe (Moderator) joecar's Avatar
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    A0014 only affects OL...

    but the PCM is in OL during warm up until CL temperature is reached.

  9. #9
    Lifetime Member smslyguy's Avatar
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    On a c.o.s. with the octane scaler set to 100% to use the high octane table, would it revert back to the low octane if knock was detected or not?
    2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...

    Now own a 2015 1LE camaro

  10. #10
    Lifetime Member 5.7ute's Avatar
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    Is there any positive fuel trims being added when you are at WOT over 60 degrees compared to WOT under 60 degrees?
    The Tremor at AIR

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