Lingenfelter L460145297 Lingenfelter LNC-2000 LS Timing Retard Launch Controller v2.0 - Manual (Page 31)

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 activation input and retest (leaving the LNC connected to the coil packs)
• Does the problem still occur?
• If no, the problem is likely coming from the 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 machanical relay in a
high vibration/acceleration environment? If so, try switching to a solid state relay.
• If yes, disconnect the LNC from the vehicle completely 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.
• LNC is active all of the time
• Have someone check the LED’s to see what they do when the LNC activates.
• Make sure that the LNC ground activation wire is not connected to an “always on” ground.
This connection is not a module ground but an activation ground.
• Make sure you don’t have the yellow and green activation wires connected to each other - this
will cause the LNC to always be active.
• Timing retard not working
• NOTE - the timing retard will NOT show up on a scan tool as the ECM or PCM is not aware of
the timing retard.
• Make sure engine RPM is greater than 1000 RPM (timing retard is not active below 1000
RPM)
• Check what the LED’s on the LNC are doing when the timing retard should become active
• Check your timing with a timing light with the retard active and not active
• Check what the LNC thinks the amount of timing retard is using a volt meter on the gray
analog out wire. Does it agree with your settings?
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