Announcement

Collapse
No announcement yet.

Pro Flo XT Idle Setup Procedure

Collapse
This is a sticky topic.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Pro Flo XT Idle Setup Procedure

    •Warm up to operating temp.
    •Verify idle control is turned ON.
    •If the idle speed will not come down to the desired RPM, cover the air bypass port with a piece of tape.
    •Adjust the idle screw to the desired idle RPM.
    •With Trans in neutral/Park set the idle target 100 to 150 RPM lower than the desired idle speed.
    •Note the VAC value on the calibration module.
    •Go to fuel Modifiers and find the RPM and VAC setting closest to your current Idle and VAC readings.
    •Slowly add or subtract fuel until you get the best idle quality.
    •Readjust idle speed with blade adjustment screw to the desired idle RPM.
    •Again, note the VAC value on the calibration module.
    •Go to spark Modifiers and find the RPM and VAC setting closest to your current Idle and VAC readings.
    •Slowly add or subtract spark until you get the best idle quality.
    •Readjust idle speed with blade adjustment screw to the desired idle, if necessary.
    •Remove tape from the throttle air bypass port.
    •Set target idle RPM with the calibration module.
    •Save changes to Position A in the calibration module.
    •After that is done, drop the trans into gear. You should see a slight drop in idle speed and then the Idle control should bring it back to the desired speed.
    If you get any surging or erratic idle do the following;

    • Note the lowest RPM during the surging and the average VAC readings.
    • Return the trans to neutral.
    • Turn off Closed Loop Control.
    • Go into the Fuel modifiers and find the RPM and VAC settings closest to the values noted above.
    • Add 10% fuel.
    • Put trans back into gear and see if the surging has gotten better or worse.
    • If better, go back and add or subtract fuel until you get the highest VAC and a stable idle. Same goes if the surge is worse.
    • When you are satisfied with the results, turn closed loop back ON and save changes to position A again.

    Here are some things to keep in mind;
    • You must save your changes before turning the ignition ON/OFF. If they are not saved, they will be erased when you restart.
    • The ECU always starts in position A. you must save the changes to position A for them to do anything. You can save your current tune into B or C and restore them later if you want.
    • You should never have big jumps in the Fuel or Spark modifiers from one location to the next. If you have 10% in one location the surrounding locations should not very more than an additional 10%.
    • Only use the Idle fuel and spark settings once you have the regular Fuel and Spark Modifiers where the engine runs the best.
    • Closed loop control does not work at Idle.

  • #2
    Setting the Idle

    Would it matter if the AC is on or off when doing this?

    Comment


    • #3
      Idle adjustment

      What changes are needed with a stick shift with air. Should the air be turned on or off.

      Comment


      • #4
        A fuel injection system is designed to run at "X" RPM at idle.
        X = The lowest RPM the motor needs to run smoothly.
        The system will not let it go below the "X"...... That's one of the benefits of EFI.
        Jeff's post is for setting " X" only.

        If you have a air conditioning unit, or large alternator ( for example very large stereo system ), or any other device that will bog down the motor at "X" RPM.
        The RPMs will have to be increased, so the motor does not die.

        The system should have a " trigger" wire that when activated ( and programmed ) will raise the RPMs to a higher idle.

        At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

        Comment


        • #5
          I have a 350 sb chevy, installed an edelbrock pro flo 4 xt on it. Can't get it to run idle smooth. I checked for vaccum leak fuel pressure is at 43psi. Did advanced tuning, fuel modifier, spark control, short ft is at -30, long ft is at 4, and timing at 12. But still rough idle.

          Comment


          • #6
            Wrong section of the forum. This is not for Pro-Flo 4.
            At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

            Comment

            Working...
            X