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Secondary Ignition

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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Secondary Ignition

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  1. Secondary Ignition Will need crossfire demo

  2. VHS Auto

  3. Points close or transistor turns on. . . Primary circuit is complete current flows VHS Auto

  4. Magnetic field builds to saturation VHS Auto

  5. Points open or transistor turns off. . . If using points, condenser absorbs electrons until points get all the way open VHS Auto

  6. Magnetic field collapses from primary winding. . . High voltage is induced In secondary winding VHS Auto

  7. Yea, we have heard that enough times!Now what does it do? 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 VHS Auto

  9. High voltage pushes Current (less than 10 mA) to spark plug through secondary circuit VHS Auto

  10. Coil secondary winding Rotor Distributor cap Spark plug wires including coil wire (high tension wires) Spark plugs Secondary ignition components VHS Auto

  11. 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)

  12. May have a vent Distributor caps Electronic ignition Point type ignition Can have male Or female terminals May have #1 marked VHS Auto

  13. Ridges are to increase insulation May have a vent Distributor caps Electronic ignition Point type ignition 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 VHS Auto

  15. Don’t try to clean, will come right back Carbon tracks (replace cap) VHS Auto

  16. External corrosion Prevent by using Diaelectric grease VHS Auto

  17. Internal corrosion VHS Auto

  18. Missing carbon button VHS Auto

  19. Arcing cap 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 VHS Auto

  21. How rotors should only go on one way VHS Auto

  22. Rotors 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 VHS Auto

  24. Spark jumping thru (hole burned in rotor) VHS Auto

  25. Burnt off spring 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) 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 VHS Auto

  28. Wire separators • Use factory routing of wires • Improper routing and separation can cause pre-ignition and holes in pistons VHS Auto

  29. Firing orders that cause problems GM’s & Chrysler VHS Auto

  30. Demonstration of cross fire VHS Auto

  31. Inspect wires for: • Resistance • Damage to insulation • Damaged boots • Signs of burning thru insulation • Corrosion to terminals • Proper routing and separation VHS Auto

  32. Checking wire resistance VHS Auto

  33. Checking boots VHS Auto

  34. Proper routing and separation VHS Auto

  35. 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 VHS Auto

  36. Spark plugs • We will do later in a separate presentation VHS Auto

  37. Dual carbon button Makes contact on dual Level rotor $$$ Nissan’s dual coil set-up VHS Auto

  38. 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 VHS Auto

  39. Secondary ignition questions VHS Auto

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