Electrical Systems
7.30
PVL Ignition Troubleshooting
CAUTION:
S Verify spark plugs are RESISTOR TYPE!
S Verify that the spark plug wires are PVL RESISTOR TYPE!
RFI is caused by the tendency of plug voltage to rise and fall rapidly once the spark plug is fired. These alternating
currents are suppressed by the use of resistor spark plugs, and high--tension wires.
The creation of RFI can disrupt the the micro-processors within the CDI box and cause ignition misfiring. For
these reasons it is extremely important that Polaris Domestic Engines utilize the PVL spark plug caps, RESISTOR
WIRES and resistor spark plugs.
Time
Start End
A large change in electrical
current
happens immediately after the
spark plug fires and causes
strong RFI generation
Electrical current wave after spark plug fires.
Time
Start End
Electrical current wave with & without RFI suppression
Without RFI suppression
With RFI suppression
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