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Thread: Handheld Use

  1. #1

    Default Handheld Use

    I was getting familiar with the handheld with the key in the on position, heard the fuel prime within the 2.5 seconds as it should, and within minutes after, sounded like the Sniper ECU or Injectors were intermittently making noise.
    1: Is this normal to hear intermittent noise when engine not running?
    2: Is use of handheld and or additional programming only when car is running (other than initial setup)?
    Thank you.

  2. #2
    Join Date
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    Default

    Quote Originally Posted by Johnlab View Post
    ...and within minutes after, sounded like the Sniper ECU or Injectors were intermittently making noise.
    1: Is this normal to hear intermittent noise when engine not running?
    After the initial fuel pump prime (5 seconds at key-on), the ECU doesn't operate the fuel injectors until it receives an RPM signal.

    2: Is use of handheld and or additional programming only when car is running (other than initial setup)?
    There are certain parameters that are programmable with key-on/engine-off.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

    Default

    If you're going to do key-on/engine-off changes and don't anticipate starting the engine thereafter, depress the accelerator beyond 50% while doing the key-on to avoid the prime shot. Multiple key-on/engine-off events will lead to a flood condition.

  4. #4

    Default

    I was curious about this. So, if you turn the ignition "on", and just hold the accelerator open, (more than 50%), it will NOT prime the engine with fuel? I thought the only way to avoid the prime shot was to crank the engine right after, or within 2.5 seconds of switching the ignition on.

  5. #5

    Default

    Correct, it works like an OEM EFI system to clear a flood condition. Depress the accelerator past 50%, then turn the key to the on position; no prime shot.

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