1985 Ford LTD, Ignition - Primary Waveform

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Posted to the Waveform Library on 1/30/2001

Number 5 plug wire was open. Top image, current probe connected around primary ignition wire. Bottom image, current probe laying next to primary ignition wire.

Vehicle Data

1985 Ford LTD Crown Victoria 5.0L

Engine	5.0 L / 8 cyl / GAS
Trans	4-speed AutomaticTransmission
Delivery	Fuel Injection
Subsystem	Ignition
Component	Ignition - Primary
Condition	Known Bad

References

THEORY: ign coil current waveform with negative blip after fireing line
THEORY: Primary tail effect, more then just RF noise.
THEORY: Primary tail effect, more then just RF noise.

Vehicle Data

1985 Ford LTD Crown Victoria 5.0L

Engine	5.0 L / 8 cyl / GAS
Trans	4-speed AutomaticTransmission
Delivery	Fuel Injection
Subsystem	Ignition
Component	Ignition - Primary
Condition	Known Bad

References

THEORY: ign coil current waveform with negative blip after fireing line
THEORY: Primary tail effect, more then just RF noise.
THEORY: Primary tail effect, more then just RF noise.