Lingenfelter L460135297 Lingenfelter LNC-TC1 Torque Cut Module RPM Limit v1.1 - Manual (Page 13)

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Troubleshooting:
• Intermittent misfire or other erratic vehicle operation.
• Have someone monitor the LED’s on the LNC and note what they are doing when the
problem occurs. Try changing the RPM settings on the LNC. Does the problem still occur
and, if so, at the same RPM?
• Disconnect the RPM limit activation input and retest (leaving the LNC connected to the coil
packs and the load cell/external input)
• Does the problem still occur?
• If no, the problem is likely coming from the RPM limit activation input.
• Check for an erratic activation signal or electrical noise on the activation input.
Are you using a microswitch or momentary switch? Bypass this device to confirm
that it isn’t giving you erratic activation signals. Are you using a mechanical relay
in a high vibration/acceleration environment? If so, try switching to a solid state
relay.
• If yes, disconnect the load cell/external input from the LNC and retest
• If the problem goes away with the load cell/external input disconnection, check
to make sure vibration or other forces aren’t causing unexpected torque cut
activation. Change the Kill Time and see if the condition changes.
• If it changes, your Kill Enable setting is likely too sensitive (increase the Kill
Enable Offset Voltage)
• If the problem doesn’t appear to be caused by shifter vibration/movement, check
for noise coming from the load cell/external input side of the circuit
• If the problem still occurs, disconnect the LNC from the vehicle completely
(activation, load cell and coils) and test again.
• If the problem still occurs, it is not related to the LNC.
• If the problem goes away, re-install the LNC and test the following:
• Re-route the LNC wiring harness away from the spark plug wires and/or
ignition coils.
• Make sure the wires are not run in parallel with electrical wiring including
fuel injector harness wires or nitrous solenoid wires.
• Mount the LNC in a different location.
• If you are using aftermarket spark plug wires, try changing back to the stock
spark plug wires or a different brand of spark plug wires. Make sure you are
using noise suppression spark plug wires.
• If you are using aftermarket/non OEM spark plugs, confirm that they are
really a resistor type plug.
• No power LED on LNC/no vehicle start up
• Try disconnecting everything and plugging it all back in - you may have corroded or loose
connections. Inspect all connectors and wires for damage and wear.