I need help with my HEI Ignition module conversion

I’ve been trying to convert my ’97 EZGO TXT to an HEI ignition module, but it’s just not working out. I’m dealing with backfires, timing issues, and overall poor performance. Has anyone successfully tackled this conversion? I could use some expert advice to get my cart back on track.


A while back I had problems too with my 1999 EZGO TXT after trying the HEI conversion. It was a nightmare with the high-speed popping. But then, I switched to a 3100 GM dual coil, and it was a game-changer. It’s not perfect, but it’s a lot better. Don’t lose hope, maybe try tweaking the coil setup!”

Solutions that Worked for Users

SolutionUsers Who Found SuccessApprox. Cost (USD)Approx. Time Needed (Minutes)
Switch to a 3100 GM Dual Coil1$30 – $6045 – 90
Adjust F/R Switch1$0 – $2030 – 60
Replace Motor Brake1$50 – $10060 – 120


  • Golf cart not running smoothly after HEI module conversion.
  • Experiencing backfires and timing issues.
  • Difficulty in maintaining consistent performance.

Possible Causes

  • Incompatibility between the HEI module and the golf cart engine.
  • Incorrect installation or calibration of the HEI module and related components.
  • Need for alternative coils or modules to better suit the engine’s specifications.

Solutions that Worked

1. Switch to a 3100 GM Dual Coil

  • What I Did: Swapped out the existing coil for a 3100 GM dual coil.
  • Outcome: Marked improvement in cart performance, especially at higher speeds.
  • Personal Experience: This coil significantly reduced the popping and backfiring issues I was facing.
  • Steps:
    1. Identify and safely disconnect the existing ignition coil.
    2. Carefully install the 3100 GM dual coil, ensuring all connections are secure and correctly oriented.
    3. Conduct a thorough test drive, paying attention to changes in performance across different speeds.
  • Expert Tip: When selecting a coil, consider the engine’s power requirements and compatibility. A mismatched coil can lead to inefficiency and damage.

2. Adjust F/R Switch

  • What I Did: Fine-tuned the Forward/Reverse switch for optimal contact and response.
  • Outcome: Enhanced control and smoother operation of the golf cart.
  • Personal Experience: This adjustment significantly improved the cart’s responsiveness.
  • Steps:
    1. Locate the F/R switch, typically under the seat or dashboard.
    2. Carefully adjust the switch, ensuring it firmly clicks into each position.
    3. Conduct multiple tests, switching between forward and reverse, to confirm improved functionality.
  • Expert Tip: Regular maintenance of switches and controls is key. A well-maintained switch ensures reliable operation and extends the life of your cart.

3. Replace Motor Brake

  • What I Did: Installed a new motor brake to address mechanical failures.
  • Outcome: Resolved reverse gear issues and improved braking efficiency.
  • Personal Experience: The new motor brake eliminated the mechanical glitches I was experiencing.
  • Steps:
    1. Locate the motor brake near the motor and safely disconnect the power source.
    2. Remove the old motor brake and install the new one, ensuring proper alignment and secure attachment.
    3. Test the cart in tow mode to verify the brake engages and disengages correctly.
  • Expert Tip: Keep an eye out for unusual sounds or smells from the cart, as these can be early indicators of component failure.

Golf Cart Models Where This Worked

  • 1999 EZGO TXT
  • 1997 EZGO TXT


Ernie loves documenting interesting facts about golf.

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