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Secondary Ignition. Will need crossfire demo. Points close or transistor turns on. . . Primary circuit is complete current flows. Magnetic field builds to saturation. Points open or transistor turns off. . . If using points, condenser absorbs electrons until points get all the way open.

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Presentation Transcript
Secondary ignition

Secondary Ignition

Will need crossfire demo



Points close or transistor

turns on. . .

Primary circuit is complete

current flows

VHS Auto


Magnetic field builds to

saturation

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Points open or transistor

turns off. . .

If using points, condenser

absorbs electrons until

points get all the way open

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Magnetic field collapses

from primary winding. . .

High voltage is induced

In secondary winding

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Yea we have heard that enough times now what does it do
Yea, we have heard that enough times!Now what does it do?

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Secondary ignition1
Secondary ignition

  • Primary ignition’s job was to make the high voltage

  • Secondary ignition’s job is to get the high voltage to push current to the right spark plug at the right time

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High voltage pushes

Current (less than 10 mA)

to spark plug through

secondary circuit

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Secondary ignition components

Coil secondary winding

Rotor

Distributor cap

Spark plug wires including coil wire (high tension wires)

Spark plugs

Secondary ignition components

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Ignition coil secondary winding

Positive Terminal

Labeled: “+” “Batt”

Negative Terminal

Labeled: “-” “Dist”

Secondary Winding

Connects from –

to center of coil

Ignition Coil secondary winding

Has about 25,000

windings Standard

Resistance is 8,500 to

12,000 ohms

Can create approximately

30,000 volts (30 KV)


Distributor caps

May have a vent

Distributor caps

Electronic ignition Point type ignition

Can have male

Or female terminals

May have #1 marked

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Distributor caps1

Ridges are

to increase

insulation

May have a vent

Distributor caps

Electronic ignition Point type ignition

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Inspecting distributor cap
Inspecting distributor cap

  • Underside

    • Look for cracks

    • Look for worn or missing center carbon button

    • Look for carbon tracks

    • Look for build-up on terminals

    • Look for moisture

  • Outside

    • Look for corrosion on terminals

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Carbon tracks replace cap

Don’t try to clean, will come right back

Carbon tracks (replace cap)

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External corrosion
External corrosion

Prevent by using

Diaelectric grease

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Arcing cap
Arcing cap

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Rotors
Rotors

  • Connect to distributor shaft

    • Can (should) only go on one way

  • Only touches distributor cap carbon button

    • Doesn't touch distributor cap terminals

      • Usually .060” to .100”

  • Some have resistor built in

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Rotors

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Inspect rotors for
Inspect rotors for:

  • Wearing thru on spring that touches carbon button

  • Signs of spark jumping thru to bottom side

  • Wearing away of tip

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Spark jumping thru hole burned in rotor
Spark jumping thru (hole burned in rotor)

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Plug coil wires high tension wires
Plug & Coil wires (high tension wires)

  • Come with

    • Different amounts of insulation

      • 7mm (point type)

      • 8mm, 8.5mm, 10mm (electronic and computerized ignition)

    • Different kinds of cores

      • Carbon string (up to 7000 ohms per foot)

      • Spiral wound (up to 1000 ohms per foot)

      • Wire core (no resistance)

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Removing wires
Removing wires

  • Grasp boot and twist and pull

    • Do not pull on wire

  • Can use plug wire removing tool if there is room to get down under

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Wire separators
Wire separators

  • Use factory routing of wires

  • Improper routing and separation can cause pre-ignition and holes in pistons

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Firing orders that cause problems
Firing orders that cause problems

GM’s & Chrysler

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Inspect wires for
Inspect wires for:

  • Resistance

  • Damage to insulation

  • Damaged boots

  • Signs of burning thru insulation

  • Corrosion to terminals

  • Proper routing and separation

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Checking boots
Checking boots

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Checking wire insulation under load
Checking wire insulation under load

  • Mist water onto plug wires with spray bottle

  • Load engine or give vacuum leak

  • Look and listen for spark jumping out of wires to common

  • Works best at night

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Spark plugs
Spark plugs

  • We will do later in a separate presentation

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Nissan s dual coil set up

Dual carbon

button

Makes contact on dual

Level rotor $$$

Nissan’s dual coil set-up

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Secondary ignition review
Secondary ignition review

  • High voltage, low amperage (up to 50,000v, .010a)

  • Requires excellent insulation

  • Parts include

    • Secondary winding in coil

    • Distributor cap

    • Rotor

    • High Tension wires

    • Spark Plugs

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