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The designs may vary from: • “COIL NEAR PLUG” with a very short plug wire.• “COIL ON PLUG” with control module located away from engine heat. • “COIL AND MODULE” in one assembly. • “DIS VERSION” with one coil tower directly connected to the spark plug, while the other tower uses a short plug wire. Vehicle type : ACCURA, ALFA ROMEO, AUDI, BMW, Cadillac, Ford, Mitsubishi and more. The objective of the ignition system is: 1. To create a spark hot enough to ignite the fuel mixture. 2. To time the ignition for maximum efficiency. 3. To maintain the spark for as long as there is fuel in the combustion chamber. In primary analysis, the absence of the KV spike places all the diagnostic emphasis on the firing time. This in itself is not all that bad with a system that has no plug wires, and no multiple gaps. (”Waste gap” or “Rotor-air-gap”). The Inductive kick has limited diagnostic value. The purpose of the ignition system is not only to ignite the spark in the combustion chamber at the right time, but also to maintain the firing for as long as there is fuel in the combustion chamber. Therefore, observing the firing time is the first objective! Isolate: Is problem related to a cylinder? Identify: Which cylinder or cylinders? The only safe way to kill a spark is by inhibiting coil output without shorting the current limiting. …module. CYLINDER PERFORMANCE TESTING. This new concept, utilized by the COP-II & COP-III, uses a very unique method. The circuit allows the primary current to build up normally, but absorbs the energy of the collapsing magnetic field, effectively preventing the plug from firing. Because the primary current is not affected, no computer code is generated in most cases. Preliminary diagnosis without a scope, DEAD CYLINDER TEST.
Tags : combustion chamber, air gap, heat coil, cylinder test, fuel mixture, alfa romeo, maximum efficiency, wire coil, diagnostic value, audi bmw, engine heat, plug wires, safe way, spark plug, computer code
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