Secondary Ignition Will need crossfire demo 11/2001VHS Auto2.
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Transcript of Secondary Ignition Will need crossfire demo 11/2001VHS Auto2.
Secondary Ignition
Will need crossfire demo
11/2001 VHS Auto 2
11/2001 VHS Auto 3
Points close or transistorturns on. . .
Primary circuit is completecurrent flows
11/2001 VHS Auto 4
Magnetic field builds tosaturation
11/2001 VHS Auto 5
Points open or transistorturns off. . .
If using points, condenserabsorbs electrons until
points get all the way open
11/2001 VHS Auto 6
Magnetic field collapsesfrom primary winding. . .High voltage is inducedIn secondary winding
11/2001 VHS Auto 7
Yea, we have heard that enough times!
Now what does it do?
11/2001 VHS Auto 8
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
11/2001 VHS Auto 9
High voltage pushesCurrent (less than 10 mA)
to spark plug throughsecondary circuit
11/2001 VHS Auto 10
Secondary ignition components
Coil secondary winding
Rotor Distributor cap Spark plug wires
including coil wire (high tension wires)
Spark plugs
Ignition Coil secondary winding
Positive TerminalLabeled: “+” “Batt”
Negative TerminalLabeled: “-” “Dist”
Secondary WindingConnects from –to center of coil
Has about 25,000windings StandardResistance is 8,500 to12,000 ohms
Can create approximately30,000 volts (30 KV)
11/2001 VHS Auto 12
Distributor caps
Electronic ignition Point type ignition
Can have maleOr female terminals
May have a vent
May have #1 marked
11/2001 VHS Auto 13
Distributor caps
Electronic ignition Point type ignition
May have a vent
Ridges areto increaseinsulation
11/2001 VHS Auto 14
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
11/2001 VHS Auto 15
Carbon tracks (replace cap)
Don’t try to clean, will come right back
11/2001 VHS Auto 16
External corrosion
Prevent by usingDiaelectric grease
11/2001 VHS Auto 17
Internal corrosion
11/2001 VHS Auto 18
Missing carbon button
11/2001 VHS Auto 19
Arcing cap
11/2001 VHS Auto 20
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
11/2001 VHS Auto 21
How rotors should only go on one way
11/2001 VHS Auto 22
11/2001 VHS Auto 23
Inspect rotors for: Wearing thru on spring that
touches carbon button Signs of spark jumping thru to
bottom side Wearing away of tip
11/2001 VHS Auto 24
Spark jumping thru (hole burned in rotor)
11/2001 VHS Auto 25
Burnt off spring
11/2001 VHS Auto 26
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)
11/2001 VHS Auto 27
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
11/2001 VHS Auto 28
Use factory routing of wires
Improper routing and separation can cause pre-ignition and holes in pistons
Wire separators
11/2001 VHS Auto 29
Firing orders that cause problems
GM’s & Chrysler
11/2001 VHS Auto 30
Demonstration of cross fire
31VHS Auto11/2001
11/2001 VHS Auto 32
Inspect wires for: Resistance Damage to insulation Damaged boots Signs of burning thru
insulation Corrosion to terminals Proper routing and
separation
11/2001 VHS Auto 33
Checking wire resistance
11/2001 VHS Auto 34
Checking boots
11/2001 VHS Auto 35
Proper routing and separation
11/2001 VHS Auto 36
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
11/2001 VHS Auto 37
Spark plugs We will do later in a separate
presentation
11/2001 VHS Auto 38
Nissan’s dual coil set-upDual carbonbutton
Makes contact on dualLevel rotor $$$
11/2001 VHS Auto 39
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
11/2001 VHS Auto 40
Secondary ignition questions