The first step in testing a Hei coil is to gather the necessary tools. The most important tool is an ohmmeter. An ohmmeter is used to measure the resistance of the coil. Additionally, a basic set of tools such as a screwdriver and a wrench may be needed to remove the Hei coil from the vehicle. #1 ยท Dec 2, 2006 350 Chevy won't start!!!! Is there a way to test the coil and module to see which one needs replaced? I have 12-Volt at the Battery wire going to the distributor but she won't start!!!! I put one of those cross-fire caps/coils (puts 4-wires on each side) that makes a neat wire job on a show car about 3 years ago.
Testing GM HEI Coil YouTube
Testing an HEI or High Energy Ignition Coil with an Ohm Meter To test for a good ground, a jumper wire can be attached to the distributor by connecting it anywhere on the housing and running it to the negative side of the battery. If all of that checks out, the following steps will help you to test the coil inside the cap, and the magnetic pick up. Testing a GM HEI Distributor, checking primary and secondary coil windings, pick up coil and bench top testing. To check the pick-up coil, attach an ohmmeter to the two leads, as seen in the lead photo of this article. The reading should be between 500 and 1,500 ohms. Make sure to jiggle the wires with the meter attached to test for any breaks. There are three main components in an HEI: the ignition module, the pick-up coil and the integral high-tension.
Repair Guides
After verifying you have 12 vdc feeding your distributor of your HEI distributor Remove the coil and test the primary and secondary windings using a multimet. From what I've read, the HEI coil should test within the following parameters: - BATT to TACH terminal should have 0 to 1 ohm - BATT to "where the spark comes out" should have 6,000 to 30,000 ohms I've tested 3 HEI coils and all got the same result: - BATT to TACH terminals has about 0.7 ohms Got the HEI No-Spark Blues? Don't worry, be happy. HEIs are as easy as pie to fix. You don't even need kilobuck 'scopes, module testers, or computer interfaces. The Usual Legal Disclaimers And Stuff. This is NOT the official factory diagnostic proce-dure. This is shorter and simpler. It requires fewer special tools. How Do You Test a Hei Coil? Testing the HEI Coil - Step by Step: Follow these steps to effectively test the High Energy Ignition (HEI) coil: 1. Safety First: Before starting any testing procedure, ensure the engine is turned off, and disconnect the battery to prevent electrical shock or accidents. 2.
HOW TO GM HEI Distributor Pickup coil troubleshooting YouTube
Set your multimeter to measure resistance (ohms). Locate the two terminals on the ignition module where the pickup coil connects. These are usually labeled "batt" and "tach.". Place the multimeter's positive lead on the "batt" terminal and the negative lead on the "tach" terminal. Note the reading on the multimeter. Sep 1, 2001 12 Photos ACCEL, Pertronix, MSD, Performance Distributors, and several others offer performance versions of the HEI either as complete distributors or as separate modules and coils,.
HEI Distributor Pickup Coil Test RockysRoadshow 10.7K subscribers Subscribe 320K views 10 years ago How to Test the High Energy Ignition Distributor Pickup Coil..Ooops.Please. The ONLY testing that actually works for HEI coils and modules is now done on an off veh8icle run tester that most good auto parts stores have in store. Key is to let the coil run to get it to operating temperatures, as defects ihn those coils don't usually occur until they reach full temperature, or, very close to it. Let it run on the machine.
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Seriously? Now what's wrong. when we went Autocrossing, do you remember how the GTO was misfiring? It's time to test, diagnose, and discuss the symptoms. Testing the HEI coil is essential to ensure its proper functioning and prevent potential ignition issues. In this step-by-step guide, we will walk you through the process of testing the HEI coil. By following these instructions, you will be able to determine whether your HEI coil is working correctly or if it requires further attention..
