Technical Support - Electronic Systems - EFI Troubleshooting
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Intermittent Concerns including: Engine stutters or skips, ECU doesn’t follow engine RPM, rough idle or dead spots and hesitation that can’t be tuned out

After installation excessive EMI (Electromagnetic Interference) can be encountered. It is REQUIRED that the main power wires for the ignition box be attached directly to the battery. Do not attach these wires to the starter lug, starter relays, junction block, or the master disconnect switch.

• The magnetic pickup wires from the distributor to the ignition box should not be bundled with any other 12V wiring and should not be tied in a loop.

• Spark plug wires must be spiral core type, NO solid wires.

• Either an MSD or Mallory ignition box must be used.

•The ECU positive and ground wires should be wired directly to the battery.

• The alternator output should be attached directly to the battery.