There are two ways to test the ignition coil of your vehicle: the spark plug test and the bench test. Ignition Coil Replacement cost: For those who are not good with car repairs, and cannot replace their ignition coil by themselves, you can take your car to an auto repair shop.The cost of ignition coil replacement will depend on the type of vehicle you drive. Now lets find out what tools we need to properly diagnose these ignition coil packs. Need to buy one? If it's bad, you'll get a weak spark or no spark at all. A bad oil pack can make your F250 almost un-drivable. Honda | If it's bad, you'll get a weak spark or no spark at all. This checks the secondary resistance. Since 2003 Dan Ferrell has contributed general and consumer-oriented news to television and the Web. When an engine with coil-on-plug (COP) ignition starts to misfire, there are two challenges: finding out which cylinder is misfiring and finding out why. When the ignition coil on your 2.9L, 3.0L or 3.8L Ford V6 goes bad, your Ford is not gonna' start and you might be left wondering if the problem is the ignition coil or the ignition control module. when ignition is key 0 position there is no noise ignition to key 2 position (engine off)static noise starts immediately and after engine on it follows to rpm. You'll find, on the column on the right, a box titled: Applies To and in it a list of most of the makes and models this testing info applies to. On your DIN test machine or on your workbench, hold the lead that is attached to the ignition coil. Unplug the spark plug wires from the coil and label the wires if necessary for proper installation. How to Test a Coil Pack. This voltage is distributed by the module to the 3 ignition coils sitting on top of it and to the crankshaft position sensor assembly. Why? Most coils should read between 0.4 and 2 ohms. To successfully diagnose the misfire or ignition system on your 4.6L Ford vehicle, it's important that you understand what this means, so be sure and read the section ‘Coil Pack Basics’ before you start testing.TIP 2: Think and breathe SAFETY the whole time you're physically doing the… ALSO VERY IMPORTANT after shutting off my engine car door gives me electric shocks. Coils are sensitive to heat and may produce an intermittent problem if their internal components become weak. Locate the coil pack in your engine by following the spark plug wires from the spark plugs; the wires are connected to the coil pack. The tool is installed inline with the ignition coil to determine if the coil is producing a spark. This step is the most crucial and requires concentration and precaution. VW | Connect your multimeter to the positive terminal or pin of your coil, and to the high output terminal that goes to the spark plug. You can also test an ignition coil with a spark tester. This material may not be reproduced without the author's consent. IMPORTANT: Before you jump into the tests, please read the following tips and suggestions:TIP 1: I'll use the phrase ‘Paired Cylinders’ quite a bit. Testing an ignition coil simply involves removing it from its place on the engine valve cover and attaching a spark tester to it. As you already know, each coil pack comes with two towers that fire off a spark to two different cylinders simultaneously. Most ignition coils will fall into similar ranges when reading the resistance, but there can be some variation by manufacturer and coil type. A bad oil pack can make your Silverado almost un-drivable. Make sure to hold the insulated part of the wire and not the naked part. If you plan on replacing only one coil you will need less than 30 minutes. That just confirms that the spark plug fires in open air. You don't need any expensive testing equipment to test and diagnose a bad ignition coil pack on your Chevy (or Buick, or Pontiac, or Olds) car or mini-van. This jumper cable will come in handy in Test 2 of this article. Hi, I have a 2002 Nissan Maxima with a 3.5 V6 engine. Most coils should read between 0.4 and 2 ohms. Monitor ignition patterns Using an oscilloscope offer the best diagnosis for an ignition system‘s bad coil pack. This energy then travels via the distributor to the spark plugs, and then ignites the fuel. Basic Working Theory Of The 3.8L Ignition Coil Pack. Ignition coils take energy from the battery (usually 12 volts) and convert it to a high enough voltage (50,000 volts or more) to create a spark. Suzuki | You do need a few basic tools and these tools won't break the bank. How to Test Ignition Coils . You may get a reading between 0.3 and 1.0 or more, depending on your particular model. Replacing Mercedes Ignition Coil Packs is easy. One of these tests is checking your car’s ignition coil with a multimeter. Where is the coil? In many instances, … You can buy it here: A battery jumper cable. Also, Isuzu Rodeo and Trooper with the 3.2L V6 engine (92-95). Before starting the project, you need to order a replacement ignition coil pack. This electronically-controlled pack consists of ignition coils that are controlled by the car’s main computer. You may get a reading between 5000 to 15000 ohms, depending on your particular model. Where To Buy The Ignition Coils And Save. Usually, the primary winding coils are made of heavy wires, and they are responsible for receiving energy from the battery. It doesn’t mean the ignition coil is strong enough to fire the plug when under full compression. Common Symptoms of a BAD Ignition Coil Pack and/or Spark Plug Wires. His work has appeared in Texas, New Mexico and Miami and on various websites. If you detect such performance issues with your vehicle, you should perform a particular test. Well, because with the help of this article, you'll be testing the ignition coil packs on the car dynamically. Repeat steps 6 and 7 for each coil in the pack assembly, and compare your resistance readings to the specifications given on your vehicle service manual (see "Tips"). It’ll get worse as they lose their ability to fire the spark plugs. This checks the primary resistance on each coil. Here’s a better ignition coil test. If no voltage is observed while the additional coils on the system operate, check for bad wiring, or computer. In this type of Direct Ignition System (DIS), three individual ignition coil packs are mounted right on top of the ignition control module (ICM). The most common symptoms of a bad ignition coil are: The five most important things that you need to know about this type of Direct Ignition System to be able to test the ignition coils, are: Now, I'm gonna' go into some detail to explain lines 1 and 2 (12 Volts and the Switching Signal) above... ...As you may already know, any electric/electronic automotive component needs 12 Volts and Ground to work. Bad Coil Packs are one of the more problematic ignition issues that can occur with the Ford F150. A "rotten egg" smell coming from the tailpipe. Connect the positive and negative leads of your multimeter to the positive and negative terminals of your ignition coil. Or other ignition system malfunction codes. Do NOT follow this link or you will be banned from the site! That with the right tool, you can diagnose an ignition coil with 100% accuracy. Step 4: Test the ignition coil’s primary ignition circuit. What's gonna help you to easily find the bad coil pack or the root cause of the misfire on your 4.6L Ford car or pick up (or SUV), is to know that each coil pack is made up of 2 individual ignition coils. Or it may have little effect at all on the engine’s ability to run. Excessive tail-pipe emissions that, depending on how bad the misfire is, can be seen as black smoke coming out of the tail-pipe. This Switching Signal can be easily tested and this article will teach you how! If you are going to replace all ignition coils (6 coils on V6, 8 coils on V8, 12 coils on V12) you will need a couple of hours. To check the ignition coil's secondary resistance, connect an ohmmeter between the companion cylinder coil towers. This part is essentially an induction coil and, simply put, a high voltage transformer. Zero resistance would indicate a shorted coil while a high resistance reading would indicate an open coil. Make sure you have the approximate ohm values for the coil pack. Some coils are constructed in series and called cassette or sequence coils, or coil rails. You should first test this part of the coil; Check for the correct resistance reading from the car’s manual. In many cars I could pull a coil pack while the car is running and use a spark tester or screwdriver to test each coil pack's spark, but for the Versa I have to remove the intake manifold cover just to get to the coils & plugs, removing the ability to run the car and check. 19368; about $18 at amazon.com). Next connect the ohmmeter across terminals 2 and 3. ", Home | The next step to how to test ignition coil problems is to locate the ignition coil. Before we go on, let me tell you that this article only tests for a bad ignition coil pack(s) and is geared more toward solving a misfire condition in which the car (or minivan or truck if you're driving an Isuzu) starts and runs but runs with a misfire. Here’s a better ignition coil test. In my experience there not that easy to test, how many miles has your car done, i think its usually around 60,000 miles when coil packs start to go, when were your spark plugs last changed as they could also be the cause of your misfire. The main job of the coil pack is to increase and build the energy needed, and then release the … If you have a socket, wrench, and flathead screwdriver, you can replace your ignition coil pack right at home in a matter of 10-20 minutes. If the readings are above 2 ohms, have the coil pack replaced. Or it may have little effect at all on the engine’s ability to run. Consult your vehicle's service manual to obtain primary and secondary resistance specifications and identify primary and secondary terminals on the coil pack used on your car. This will help you get a reading of ignition coil temperature. Jeep | At the same time, you should be cracking the engine and checking if the wire produces any spark. A repair manual for the specific vehicle that you're working on. Unplug the pack's electrical connector and remove the coil pack from the engine, using a wrench or ratchet and socket if necessary. Coil Pack Basics. To find this information, research your car's engine on the Internet or purchase a Chilton's or Haynes manual to find out what the mega ohms reading on the coil pack should be. The coils then convert the energy to a higher voltage, of atleast 50,000 volts, in order to create a spark. Step three: test the ignition coil. (don't have an HEI spark tester? The 12-volt pole is the spot where the power comes into your coil. Or if you need to test the 4.6L/5.4L V8 Coil-On-Plug Ford ignition coils, click here: How To Test Ford Coil-On-Plug (COP) Ignition Coils. Some vehicles only … This will test the 3-4 coil pack. As you already know, each coil pack comes with two towers that fire off a spark to two different cylinders simultaneously. Park your car in a safe place and open the hood. Or it may have little effect at all on the engine’s ability to run. Depending on your particular vehicle model, you may find the coil pack mounted on one side or the back of the engine. A coil pack is an electronic piece of equipment within the ignition system. Ignition Coil Pin Outs. Though its precise location may vary from vehicle to vehicle, generally, it is located near the fender or bolted to a bracket fairly close to the distributor. This Switching Signal is created by the ignition control module. Coil Packs vs. Distributors If your readings are out of range, replace the coil or coils as necessary. You'll need: Although a scan tool (automotive diagnostic scanner) does come in handy to retrieve the misfire code, it's not required to test the coil packs. Ford | The resistance should be between 0.63 and 0.77 ohms. Place one lead on the center prong of the coil pack's electrical connector and the other lead on each of the spark plug terminals. thats why my indy thinks it is related to coil packs or coil … When having an issue with your car’s ignition coil, you should test the coil using a multimeter in order to determine which one is experiencing the problem. How to Diagnose a BAD Ignition Coil Pack. They do need a Ground and are grounded, but it's a ground that's turned On and Off by the ignition control module (and not thru' a wire that's connected directly to chassis Ground or the battery negative terminal). This applies to each ignition coil pack sitting on top of the ignition control module. If your vehicle does not start and you need to test the ignition control module (ICM) or the Crankshaft Position Sensor on this type of Direct Ignition System click here: Testing The Ignition Module And Crank Sensor (GM 3.1L, 3.4L). A faulty coil may fire intermittently, produce a weak spark or kill a cylinder completely. Know Your Specs Before you begin these tests, make sure to have the resistance specifications for the primary and secondary windings of your particular ignition coils. Cylinder ignition coil (electronic ignition system with map-controlled ignition) Primary: 0.5 Ω–2.0 Ω/Secondary: 8.0 kΩ–19.0 kΩ Single-spark or dual-spark ignition coil (fully electronic ignition system) Primary: 0.3 Ω–1.0 Ω/Secondary: 8.0 kΩ–15.0 kΩ This checks the primary resistance on each coil. The ignition coil sits between the battery and, if the car is an older model, the distributor that ‘distributes’ the HT voltage it produces to each spark plug, via thick rubbery HT leads (one per plug). Floor jack and 2 jack stands, if necessary. The number of each wire is stamped next to the connection terminal. If … Set your ohmmeter to the 10 ohms range, and touch the terminal B+ (usually the center prong on the coil pack electrical connector) with one of the meter test leads, and touch the corresponding coil prong on the electrical connector with the other test lead. To help you to diagnose this type of Direct Ignition System, the following sub-headings (below) will shed some light on the most common symptoms of a bad ignition coil, some basic working theory, the tools you'll need, and safety precautions you need to take when working on this type of Direct Ignition System (DIS). You need to use ohm meter to test the coil pack for continuity. You'll want to start by checking for signs of bad ignition coils, and then follow up that diagnosis by testing the coils with a multimeter. A safer way to test the ignition coil. Copyright © 2009-2020 Abraham Torres-Arredondo All Rights Reserved. DENSO 6731201 coils for about $55 each. Bad Coil Packs are one of the more problematic ignition issues that can occur with the Chevy Silverado. To see the complete list of 3.1L and 3.4L test articles, go to the GM 3.1L, 3.4L Index Of Articles. What's my mother going to do? You can find leaf blower ignition coils here. This is where you will test your wire. Jeep Ignition Coil test is one of those test you really need to know. Ignition coils are usually very simple to remove, often times only held in by one or two bolts. 02= Ignition Coil 1 Secondary Circuit- Insufficient Ionization 02= Ignition Coil 1 Secondary Circuit- Insufficient Ionization this car has a coil pack and is WASTED SPARK 3 coils 6 spark plugs. This is confirmation that the computer coil driver is sending signal to the coil for spark and that the ignition system is working. The key here will be to install the new coil so the gap between the magnets on the coil and the … To test the ignition coil connect the ohmmeter's two test leads to the coils primary terminals (+ and -). Each coil pack is around £40 buy and fit yourself as the way you removed them above. Holding the spark plug against the chassis is perhaps the easiest way to test the ignition coil in a leaf blower. The check engine light will be on on your instrument cluster due to: Misfire codes: P0300, P0301, P0302, P0303, P0304, P0305, P0306. Note: Terminal 15 is positive, terminal 1 is negative. First test cylinder numbers 1 and 2, then cylinders 3 and 4. How to test coil pack. Then connect the tester between the spark plug boot and the engine. So, obviously, without this Switching Signal the ignition coil won't spark. It should be at the end of the coil. Turn on your meter and touch the spark plug wire terminals on one of the coils with the meter leads. OK, we're done with the ‘working theory’ part. Ignition coils have two circuits that need to be checked: the primary and secondary ignition circuit. If your coil pack is mounted on the back of the engine, raise the front of the vehicle and safely support it on two jack stands to reach the coil pack from underneath the engine. Check that each plug wire is firmly plugged into the coil pack and in the right order. Coil Pack started to be executed in numerous vehicles during the late 1990's. Bad Coil Packs are one of the more problematic ignition issues that can occur with the Ford F150.A bad oil pack can make your F150 almost un-drivable. Then the engine is cranked to see if the spark tester sparks. Here are some more specific details: Each individual ignition coil (within the pack… Testing the ignition coils, to find out if you have a defective one, isn't hard and I'll explain how to test them to find out in a step-by-step manner. We'll test this part of the ignition coil second, for obvious reasons. You need to use ohm meter to test the coil pack for continuity. In this type of Direct Ignition System (DIS), three individual ignition coil packs are mounted right on top of the ignition control module (ICM). You'll need a helper to help you crank the engine while you perform the tests. Turn the vehicle off and open the hood. To test the ignition coil connect the ohmmeter's two test leads to the coils primary terminals (+ and -). An absence of spark from just ONE ignition coil points to a bad coil. The coil temperature indicates the temperature of the metallic coil when it is energized. Misc Index | Click here to see my recommendations: This inexpensive spark tester is a MUST have tool to be able to correctly diagnose the coil packs on your 3.1L or 3.4L V6 GM vehicle with the info and tests in this article. Set your ohmmeter to the 20000 ohms range. Connect the positive and negative leads of your multimeter to the ignition coil terminals. The following tutorials may also be of help: You can find this tutorial in Spanish here: Cómo Probar las Bobinas de Encendido (GM 3.1L, 3.4L) (at: autotecnico-online.com). If you're going to replace coil packs… Turn your ignition switch to "on" and put a test light or meter on the coil, one lead to plus, the other to minus. Once again, use the recommended/indicated tools for all of your tests. Most ignition coils should have a secondary resistance falling somewhere between 6,000 to 10,000 ohms; however, refer to manufacturer specifications for the correct range. It’ll get worse as they lose their ability to fire the spark plugs. (google what that means) but is important to know because either spark plug … How to Test a Jeep Coil Pack by Dustin Thornton . Step 12 - Then, crank the engine over while observing the meter, (engine should not start) the meter should pulsate between 0 and 12 volts. Now in case you're wondering what vehicles this article applies to, it applies to most of the GM models (Buick, Chevy, Olds, and Pontiac) with either a 3.1L or a 3.4L. GM | Direct ignition coils are a common failure item in a vehicle's ignition system. Or it may … If the test described below tells you the ignition coil is bad, it's a simple matter to replace it with a new one by simply reversing the process by which you removed the old one. You may get a reading between 0.3 and 1.0 or more, depending on your particular model. As with most types of vehicular maintenance, you'll want to begin the test with the vehicle in park and with the engine off. Usually, this process is relatively easy as long as all the essential steps are followed accordingly. You'll also test and diagnose bad spark plug wires and/or a faulty ignition control module. Disclaimer. Basic Working Theory of the 3.8L Ignition Coil Pack. I want to test my coil packs and I read on here that one way would be to start the car and pull each coil, … The ignition coil is responsible for providing electricity to the spark plugs, an important component of the ignition system. By the way, I am not a mechanic. Don't worry, once you get to the site they'll make sure it fits. First, you should test the coils with a multimeter. To test the coil's secondary winding, attach the test probes to the outer 12-volt pole on the coil and the center pole (where the main wire goes to the distributor). So, with those two simple tools and about 15 minutes can answer a few vital diagnostic questions for your ailing Wrangler or Cherokee. That each ignition coil can be tested on the car (or mini-van or truck if you're driving an Isuzu). Page 1 of 7: How to Test the Coil Pack (2001-2008 Chrysler 3.3L, 3.8L). There are two other ignition system tutorials that might be of interest: If you need to test the 1.9L/2.0L 4 cylinder Ford coil packs, click here: How To Test FORD 4 Cylinder Coil Packs. This article will take you by the hand (so to speak) and show you how to test them step by step on the car or mini-van in five easy steps. Chrysler | Your vehicle does not pass the emissions test. If the spark tester sparks, then you can conclude that the ignition coil … This smell is caused by unburned gasoline from the misfiring cylinder overloading the catalytic converter's oxidation process. How To Test The Ignition Coil Packs (GM 3.1L, 3.4L), Testing The Ignition Module And Crank Sensor (GM 3.1L, 3.4L), Cómo Probar las Bobinas de Encendido (GM 3.1L, 3.4L). This electronically-controlled pack consists of ignition coils that are controlled by the car’s main computer. Diagnostic Trouble Codes (DTCs): P0300, P0301, P0302, P0303, P0304, P0305, P0306 In a nutshell when you turn the key to crank and start your car: 12 Volts flow into the ignition control module.