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expert advice needed on a mis
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<blockquote data-quote="DC97Cobra" data-source="post: 8868961" data-attributes="member: 40424"><p>ok.. I found out the information and steps to test the COPs on our cars. There are two tests that you have to perform. One is for primary resistance while the second test is for secondary resistance. Tools needed would be a voltage meter that can test ohms.</p><p></p><p>For Reference:</p><p> - Stock coil resistance as per Autozones product</p><p> - Primary Resistance: 1.2 - 1.9</p><p> - Secondary Resistance: 3.5K - 7.5K</p><p>- Accel Super Coil - Part #: 140034</p><p> - Primary Resistance: 0.660 ohms</p><p> - Secondary Resistance: 6.1K ohms</p><p> - Accel's recommended percentage tolerance: 10%</p><p></p><p>- The higher the resistance = less energy to the spark plug = misfire or poor ignition.</p><p></p><p>[ATTACH=full]1118301[/ATTACH]</p><p></p><p>To test for Primary Resistance:</p><p></p><p>To test for primary resistance, you will want to set the dial on the multimeter to 200 ohm. You take the positive and negative lead and hold them against the pins where the harness connects to the coil and see what the resistance level might be. If it falls within the recommended parameters, then so far so good. For example, I tested my Accel coil packs and they all read at 0.8 ohms. Since my multimeter is cheap, it rounds up instead of giving the correct resistance. I'm assuming that this part is good as it was the same across the board but will verify at work with a better meter.</p><p></p><p>To test for Secondary Resistance:</p><p></p><p>To test for secondary resistance, you will set the dial on the multimeter to 20k ohms. You will then take one of the test leads and press it against the connector that connects to the spark plug. The other lead then needs to be pressed against one of the pins at the top of the coil. Check to see what the resistance is and verify that they are within the recommended parameters. My Accel coil packes ranged from 5.24k to 5.32k. This verifies that my coil packs are all good. Since the amount of resistance is lower than the specifications, this means that more energy from the coil can be transferred to the spark plug to produce a hotter spark.</p><p></p><p></p><p>I hope this information will help you and others that might think you are having coil pack issues. If any experts could chime in and verify that what I have posted is accurate, please do. I personally feel that this is correct but will admit that I am not an expert and do not work on cars for a living. I just hate paying someone thousands to incorrectly diagnose my car only to have myself look at it and fix their screwups.</p></blockquote><p></p>
[QUOTE="DC97Cobra, post: 8868961, member: 40424"] ok.. I found out the information and steps to test the COPs on our cars. There are two tests that you have to perform. One is for primary resistance while the second test is for secondary resistance. Tools needed would be a voltage meter that can test ohms. For Reference: - Stock coil resistance as per Autozones product - Primary Resistance: 1.2 - 1.9 - Secondary Resistance: 3.5K - 7.5K - Accel Super Coil - Part #: 140034 - Primary Resistance: 0.660 ohms - Secondary Resistance: 6.1K ohms - Accel's recommended percentage tolerance: 10% - The higher the resistance = less energy to the spark plug = misfire or poor ignition. [ATTACH=full]1118301[/ATTACH] To test for Primary Resistance: To test for primary resistance, you will want to set the dial on the multimeter to 200 ohm. You take the positive and negative lead and hold them against the pins where the harness connects to the coil and see what the resistance level might be. If it falls within the recommended parameters, then so far so good. For example, I tested my Accel coil packs and they all read at 0.8 ohms. Since my multimeter is cheap, it rounds up instead of giving the correct resistance. I'm assuming that this part is good as it was the same across the board but will verify at work with a better meter. To test for Secondary Resistance: To test for secondary resistance, you will set the dial on the multimeter to 20k ohms. You will then take one of the test leads and press it against the connector that connects to the spark plug. The other lead then needs to be pressed against one of the pins at the top of the coil. Check to see what the resistance is and verify that they are within the recommended parameters. My Accel coil packes ranged from 5.24k to 5.32k. This verifies that my coil packs are all good. Since the amount of resistance is lower than the specifications, this means that more energy from the coil can be transferred to the spark plug to produce a hotter spark. I hope this information will help you and others that might think you are having coil pack issues. If any experts could chime in and verify that what I have posted is accurate, please do. I personally feel that this is correct but will admit that I am not an expert and do not work on cars for a living. I just hate paying someone thousands to incorrectly diagnose my car only to have myself look at it and fix their screwups. [/QUOTE]
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