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Idle speed of LT1 M6

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  • #1

    Idle speed of LT1 M6

    What is the idle speed chart for a 94-95 LT1 with a M6 supposed to be from the factory.
    This is the chart I found for the A4 in Neutral.
    temp RPM
    -40 1200
    -19 1200
    3 1200
    24 1000
    46 950
    69 900
    89 850
    111 775
    132 700
    154 650
    176 650
    197 625
    219 625
    240 625
    In gear it is set to 800 at 197, 219, 240 (I don't have the other chart).

    My PCM has been reprogrammed and is set to 800 which seams quite high. I didn't have any problem when it was set to 625.
    2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

    1995 Z28, many mods, SOLD

    A proud member of the "F-Body Dirty Dozen"
    Tags: None
  • #2
    I have the stock program idle vs. coolant temp table for the A4 and M6 in my online scanner writeup:

    http://members.aol.com/InjuneerZZ/ScanMast.htm

    And 800rpm fully warmed up is the factory setting for an M6.
    Fred

    381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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    • #3
      Thank you Fred. I'll tell him to leave it alone then.
      2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

      1995 Z28, many mods, SOLD

      A proud member of the "F-Body Dirty Dozen"

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      • #4
        Mine idles at 800 - 900 rpm.
        Hercules



        2008 Sunburst Metallic HHR LT

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        • #5
          My scanner says 800 with slight fluctuations to 825 but the dash says almost 1000. I don't care what the dash says. 800 is too high Especially with the 2.6:1 1st gear. Idle in 1st is like 15 mphs. LOL I asked him to adjust it to 750 rpms at 154 deg and 700 rpms at 176 deg and up.

          As you probably guessed, I have gotten PCMForLess to do my programming. I downloaded it to the car last night. That is so weird. In the old day I'd be changing secondary springs, or tweaking distributor advance springs but now you have to have a laptop. I don't have to smell like gas anymore. In fact, I was still dressed in work cloths. Weird but good. LOL
          2002 Electron Blue Vette, 1SC, FE3/Z51, G92 3.15 gears, 308.9 RWHP 321.7 RWTQ (before any mods), SLP headers, Z06 exhaust, MSD Ignition Wires, AC Delco Iridium Spark Plugs, 160 t-stat, lots of ECM tuning

          1995 Z28, many mods, SOLD

          A proud member of the "F-Body Dirty Dozen"

          Comment

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