A Matter Of Resistance As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. This causes an increase in the voltage required to fire the spark plug, which could damage the ignition coil as well as the spark plug wires. This resistance is a combined part of the coil, plug wires, plugs, etc. Attach a spark tester to the wire and to an engine ground. Reeves says the single- and double-platinum were employed strictly as a measure to increase the durability of the spark plugs. Most reports Tempest receives about rough running engines associated with high spark plug resistance involve values of 7000 ohms or more. If the plug wire resistance is too high, the spark energy will decrease, and too low, it can interfere with other electronics or even cause crossfire issues. All colors—blue, red, green, yellow, orange, including neon tones—are available in most diameters, including 7mm, 8mm, 10mm, and more. Taylor's Extreme Service series wire sets are the absolute best for high heat, severe service and high performance applications. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. )\" for auto-range multimeters. The more efficient units can operate with slightly higher plug wire resistances to eliminate outside interferences. Nothing is magical about 5000 ohms, but using it as a cut-off point for spark plugs has proven to work well; just like using 80/60 for compression checks works well. Remove a spark plug wire from any plug. The lower the number, the lower the resistance, which means that more current will reach the spark plug. Attach the test light to a good engine ground. There’s not many technical articles about spark plug wires, and for years we’ve been relegated to finding whatever information that was out there in the form of advertisements from manufacturers or on the back of the spark plug wire box. Mopar wires 390 OHMs Fourth place belongs to the Mopar Performance spark plug wires. To perform a wire resistance test, connect an ohmmeter across each end of the wire. So, … a non-resistor plug or low resistance spiral wound spark plug wire in most applications may actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels, abnormal combustion and probable does this mean that it will increase the performance and efficiency of the vehicle. Wire insulation that’s damaged by head can allow voltage to jump to the ground rather than jumping the gap at the bottom of the spark plug. Quality High Performance Spark Plug Wire Connector TY0007C03 Withstand High / Low Temp for sale, Buy Spark Plug Wire Connector products from sparkplugconnector manufacturer. Plug Wires (or Spark Plug Wires, Ignition wires) connect the spark plugs to the distributor or ignition coils. To carry such large voltages, plug wires need to have some basic physical characteristics. Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced. Once this happens, voltage can jump to ground instead of reaching the spark plug. Super Conductor Spark Plug Wire is the ultimate performance plug wire. Until then here are some basics. On the other hand, many import models like Nissan, Honda, and Toyota use spiral-wound stainless steel mag wires with approximately 500 ohms of resistance per foot of wire. The meter will read internal wire resistance in ohms. Spark Plug Wires. Spark Plug Wire tips page. In third place, we have Accel wires. Most "high performance" plug wires brag about having low resistance. Joe went on to explain that plug wires were “Consumables” and they would get brittle and crack with age. Using non-resistance wires may damage modern ignition systems that were designed with the resistance as part of the circuit. 3-12 meg-ohms is typical, and will be higher if you use points farther away because there'll be more resistance. When your car engine isn't running right, or misfires, start by diagnosing the spark plug wires. Ignition cables deliver high-voltage current from the ignition coil to the spark plugs on older engines fitted with distributors. The resistance in plugs wires is very, very, small, compared to the high resistance of the spark plug gap, that the spark has to jump. The more efficient the wire the more spark energy is transferred to the spark plug. Attach the test light to a good engine ground. Any resistance at all would mean the plug is bad. This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc.) A good spark will be blue-white and will be plainly visible in daylight. A damaged boot can impede proper spark plug wire seating and performance. I plan to do an extensive plug wire comparison when I get my hands on a 4-channel scope. Crack the engine and check for a good spark at the spark tester. Resistance is not the most important detail to be concerned with when choosing spark plug wires. Editor's Pick: ACDelco. It offers excellent RFI suppression but also creates more resistance than other styles. This type of construction hides the conductive coating's high resistance when the overall conductor is measured with a test ohmmeter, which only measures the lower resistance of the sparse spirally wound wire (the path of least resistance) under the conductive coating and ignores the high resistance of the outermost conductive coating in which the spark energy actually travels. Spark plug wires deliver thousands of volts (up to 50,000 or more) to the spark plugs. With a bad spark plug ignition cable, there is an increased resistance which can cause the ignition coil to get damaged speedily. Resistance check shows value from 0.15 - 0.34 kOhm (1,500 - 3,400 ohm). At the moment the spark jumps the gap it causes a high frequency burst of energy, known as RFI (radio frequency interference). Is 6,000 ohms of resistance too high for good spark? The basic function of a spark plug wire is to conduct spark energy from the ignition source, whether it be a distributor or coil pack, to the spark plugs. EMI – Electro-Magnetic Interference Installing a set of wires that have high EMI resistance can help to stop any electrical issues that might be causing problems with your vehicle. Heat damage – Engine heat can burn wire insulation and boots. What is a Resistor Spark Plug? With the engine running, move the test light along the length of each spark plug wire. High quality Bended Plastic PBT Resistor Spark Plug With High / Low Temperature Resistance from China, China's leading Spark Plug Resistor product market, With strict quality control Spark Plug Resistor factories, Producing high quality Bended Plastic PBT Resistor Spark Plug With High / Low Temperature Resistance products. High quality TY0022C04 High / Low Temp Resistance Wire Set For Spark Plug Linking With Ignition Coil from China, China's leading Ignition Wire Set product market, With strict quality control Ignition Wire Set factories, Producing high quality TY0022C04 High / Low Temp Resistance Wire Set For Spark Plug Linking With Ignition Coil products. Whether you do a complete tune-up or only change the spark plugs, spark plug wires (also known as ignition cables) should always be checked first. Spark plug wires are just conductors, they can not increase power. Find the spark plug wires and sets you need for low resistance and minimum spark loss at Summit Racing. I plan to do an extensive plug wire comparison when I get my hands on a 4-channel scope. I have been looking at some bulk plug wire, braided 7mm. With the engine running, move the test light along the length of each spark plug wire. Dragon Fire High Performance Low Resistance Spark Plugs Wires Dragon Fire spark plug wires were created to deliver the best performance with long-term reliability. Spark plug wires are just conductors, they can not increase power. The wire resistance is part of the ignition circuit. Because as the measurements suggest the straight ones are close to 3,000 ohms but the others are closer to 2,000 ohms. Higher readings indicate too much resistance, possibly because of rusting or faults in the wire. Planning on making my own with the ever-dry kits from Andy Berbaum. Overall, your comparison of plug wires will still be valid with your ohmmeter. I just wanted to get some numerical values in relation to the spark plug resistance comments. Be sure to first check spark plug wires for visual damage. A broken wire allows no electricity reading at all, which will cause the multimeter to register resistance as \"over limit.\". 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