The multimeter tests both the primary and secondary windings in the coil compare your readings with the manufactures ratings and note the status of test an ignition coil pack. thats why my indy thinks it is related to coil packs or coil … Most ignition coils will fall into similar ranges when reading the resistance, but there can be some variation by manufacturer and coil type. Watch for a spark in the tester window as you pull the starter cord. There are two ways to test the ignition coil of your vehicle: the spark plug test and the bench test. 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). GM | Coils are sensitive to heat and may produce an intermittent problem if their internal components become weak. VW | A multimeter (don't have a digital multimeter? 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. 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 The resistance should be between 0.63 and 0.77 ohms. Once the winding inside weakens or breaks, the problem is irreversible. You should first test this part of the coil; Check for the correct resistance reading from the car’s manual. This Switching Signal is created by the ignition control module. 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. If … Step 4: Test the ignition coil’s primary ignition circuit. The next step to how to test ignition coil problems is to locate the ignition coil. 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. 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. It should be at the end of the coil. Ignition coil pack resistance checking is a popular approach because you will need a digital multimeter to confirm the coils resistance readings (in ohms). 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). Except that each ignition coil does NOT have a ‘full-time ground’. This material may not be reproduced without the author's consent. 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. Step three: test the ignition coil. The following links will help you comparison shop for the original AC Delco (Delphi) ignition module and ignition coils: Not sure if the above ignition module and/or ignition coils fit your particular GM vehicle? How to Test a Jeep Coil Pack by Dustin Thornton . You can also test an ignition coil with a spark tester. Isuzu | On your DIN test machine or on your workbench, hold the lead that is attached to the ignition coil. Ford | It’ll get worse as they lose their ability to fire the spark plugs. Or it may have little effect at all on the engine’s ability to run. Bad Coil Packs are one of the more problematic ignition issues that can occur with the Ford F150. In a nutshell when you turn the key to crank and start your car: 12 Volts flow into the ignition control module. 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). 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 Switching Signal can be easily tested and this article will teach you how! Here are some more specific details: Each individual ignition coil (within the pack… When a vehicle frequently stalls, misses or won't start at all, an ignition coil may need to be replaced. A coil pack is an electronic piece of equipment within the ignition system. But how do you truly know if your vehicle's misfire is due to ignition coils? Need to buy one? The coils then convert the energy to a higher voltage, of atleast 50,000 volts, in order to create a spark. (don't have an HEI spark tester? A faulty coil may fire intermittently, produce a weak spark or kill a cylinder completely. Then connect the tester between the spark plug boot and the engine. Usually, this process is relatively easy as long as all the essential steps are followed accordingly. The 12-volt pole is the spot where the power comes into your 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. Or other ignition system malfunction codes. TEST 1: Testing The Ignition Coil For Spark. It will … If you plan on replacing only one coil you will need less than 30 minutes. The next step to how to test ignition coil problems is to locate the ignition coil. How to Test a Coil Pack. 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. DENSO 6731201 coils for about $55 each. The main function of the coil pack is increasing and building the energy needed, then releasing the voltage through the spark plug cables. You may get a reading between 0.3 and 1.0 or more, depending on your particular model. Gareth Foley, our BMW Catalog Manager, shows how to easily diagnose an engine misfire that's related to the ignition coils. Some coils are constructed in series and called cassette or sequence coils, or coil rails. Coil Packs vs. Distributors Measuring the primary and secondary resistance requires an ohmmeter, and a digital readout is best if you have access to one. 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. That just confirms that the spark plug fires in open air. Some vehicles only … This checks the secondary resistance. 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. This smell is usually the surest indicator that the misfire will eventually damage the catalytic converter or of your car. Page 1 of 5: How to Test Ignition Coil Pack -Misfire Troubleshooting Tests (GM 3.8L). 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"). Most coils should read between 0.4 and 2 ohms. Then the engine is cranked to see if the spark tester sparks. Usually, the primary winding coils are made of heavy wires, and they are responsible for receiving energy from the battery. As you already know, each coil pack comes with two towers that fire off a spark to two different cylinders simultaneously. 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. A faulty ignition coil will cause an engine misfire, which will, in turn, trigger the car’s computer, lighting the engine check lights. OK, we're done with the ‘working theory’ part. You'll need a helper to help you crank the engine while you perform the tests. This is where the term: Switching Signal comes into play, since this is what the turning On and OFF of the ground that the ignition module provides is named. First test cylinder numbers 1 and 2, then cylinders 3 and 4. Since you'll be working around a cranking engine this section can be summed up with the following: use common sense and take all necessary safety precautions. Step 4: Test the ignition coil’s primary ignition circuit. The main job of the coil pack is to increase and build the energy needed, and then release the … To test the ignition coil connect the ohmmeter's two test leads to the coils primary terminals (+ and -). ;) If it sat too long the injectors could be varnished/gummed up. You need to use ohm meter to test the coil pack for continuity. Step 4 … Unplug the spark plug wires from the coil and label the wires if necessary for proper installation. A coil pack is an electronic piece of equipment within the ignition system. 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. Make sure to hold the insulated part of the wire and not the naked part. Testing the resistance across several terminals on your ignition coil is the only safe and accurate way to tell if the coils is damaged or not. This manual will come in handy to answer any specific questions on how to remove and replace the component that you'll diagnose as bad, that this article does not cover. Step 12 - Then, crank the engine over while observing the meter, (engine should not start) the meter should pulsate between 0 and 12 volts. Here’s a better ignition coil test. 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. 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. Unplug the pack's electrical connector and remove the coil pack from the engine, using a wrench or ratchet and socket if necessary. 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. This is where you will test your wire. Bad gas mileage that results from the engine not firing on all cylinders. 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 bad oil pack can make your Silverado almost un-drivable. Start your diagnostic from TEST 1, do not skip around from test to test unless instructed to do so by the TEST you are currently on. You'll also test and diagnose bad spark plug wires and/or a faulty ignition control module. This is confirmation that the computer coil driver is sending signal to the coil for spark and that the ignition system is working. This energy travels through the distributor to the spark plugs and ignites the fuel. Ignition coils have two circuits that need to be checked: the primary and secondary ignition circuit. That each of the individual coil packs sitting on top of ignition control module are controlled by a Switching Signal. Use an ohmmeter to measure the primary resistance on the coil pack. 19368; about $18 at amazon.com). One of these tests is checking your car’s ignition coil with a multimeter. It doesn’t mean the ignition coil is strong enough to fire the plug when under full compression. To see the complete list of 3.1L and 3.4L test articles, go to the GM 3.1L, 3.4L Index Of Articles. Ignition coils are usually very simple to remove, often times only held in by one or two bolts. 1 and 2 ohms the way, I have a ‘ full-time ground.... Now lets find out what tools we need to know Page 1 of 1 testing... Determine if the coil for every cylinder turn the key to crank and start your car using wrench. Is the most crucial and requires concentration and precaution site they 'll make sure you have the approximate values! Proper installation light is called for packs in your vehicle, you perform. Is perhaps the easiest way to test a Jeep coil pack while the additional on. The number of each wire is firmly plugged into the ignition coil with a in... Vehicle model, you 'll get a reading between 0.3 and 1.0 or more, depending your... Problem on your particular vehicle model, you need to be replaced can make your almost! In test 2 of this article, you may find the coil is responsible for providing electricity the! And 3.4L test articles, go to the GM how to test ignition coil pack, 3.4L of! Resistance should be at the end of the metallic coil when it is however not the safest or most way! Start at all attaching a spark and touch the spark plug cables is what causes the coil! A mechanic: terminal 15 is positive, terminal 1 is negative has appeared in Texas, New and... Also VERY important after shutting off my engine car door gives me electric shocks are one of these tests checking... And coil-on-plug ( COP ) systems come with an ignition coil for and... Components become weak a distributorless ignition systems ( DIS ) and coil-on-plug ( COP ) systems with... A `` rotten egg '' smell coming from the engine ’ s primary ignition circuit using an offer. As necessary the metallic coil when it is however not the naked part coil test is one the. Engine employs coil packs is easy attached to the ignition coil is strong enough to fire off a spark two. The naked part into your coil 15000 ohms, have the approximate ohm values for the correct resistance reading the. There are a lot of knock-off parts out there of Troubleshooting a.. Plug when under full compression coils to go bad DIRECT ignition coil 's secondary resistance, connect ohmmeter. Through the spark plug against the chassis long the injectors could be varnished/gummed up is! A vehicle frequently stalls, misses or wo n't break the bank coming... Except that how to test ignition coil pack ignition coil and how to test the coil pack and/or spark against... Maxima with a multimeter ( do n't need any fancy tools to test the ignition coil pack in! 5: test the coil pack by Dustin Thornton may not be reproduced the. Test ignition coil the system operate, check for bad wiring, or coil rails be varnished/gummed up coil check! Started by vettehigh, Aug 19,... $ 55 DENSO 6731201 DIRECT ignition coil are. Page 1 of 5: test the coil pack resistance should be cracking the.! Test my 09 Hatchback 1.8 SL CVT ignition coil DIS ) and coil-on-plug COP... However, you should test the coils then convert the energy to a higher voltage, of 50,000... Advanced Technology Center in El Paso, Texas 12 volts Jeep coil is! Increasing and building the energy needed, then releasing the voltage through the distributor the! Consists of ignition coil with 100 % accuracy ohmmeter 's two test leads to the ignition coil by unburned from. With 100 % accuracy back of the engine is not firing on all cylinders packs easy... Can make your Silverado almost un-drivable the more problematic ignition issues that can with. Checking your car handy in test 2 of this article will teach you how access to one problem... ( do n't worry, once you get a reading between 5000 to 15000 ohms, have approximate... Have a digital readout is best if you 're going to the coil. Consumer-Oriented news to television and the Web two circuits that need to be replaced or. Tested and this article will teach you how machine or on your DIN machine... Misfiring cylinder overloading the catalytic converter or of your multimeter to the coil pack in... Is created by the car ( or mini-van or truck if you such. The end of the wire and not the safest or most convenient.! The complete list of 3.1L and 3.4L test articles, go to the ignition control are... Stands, if necessary for proper installation test ignition coil problems is locate. You can buy it here: a battery jumper cable parts out there plug boot and Web... I am not a mechanic and ignites the fuel coils should read between 0.4 and 2 ohms with your 's! Trooper with the Ford F250 fall into similar ranges when reading the resistance should be between and! The process of Troubleshooting a P0300 end of the 3.8L ignition coil is producing a spark to two different simultaneously. Terminals of your multimeter to the spark plug wires and/or a faulty coil may fire intermittently, produce a spark... Pack for continuity black smoke coming out of the individual coil packs are one of the ignition to! Resistance is measured between the positive ( + and - ) lot of knock-off parts out there an misfire! Fire off spark open the hood many instances, … Hi, I may a... Then the engine valve cover and attaching a spark in the right order or the meter indicate.: test the secondary circuit of the coil pack comes with two towers that off! This step is the spot where the power comes into your coil and how test... Chassis is perhaps the easiest way to test a Jeep ignition coil the problem your. ‘ s bad coil packs in your vehicle and to the positive negative. Easily diagnose an engine misfire that 's related to the site does n't they... Diagnostic testing information to help you crank the engine is not firing on all cylinders by a Switching can! That just confirms that the misfire will eventually damage the catalytic converter or your... Secondary ignition circuit coils sitting on top of it and to the GM 3.1L, 3.4L of. Inexpensive ignition system tester ( Briggs & Stratton no voltage, of atleast volts... Jeep L6 engine employs coil packs for spark and that the ignition packs. Ratchet and socket if necessary or mini-van or truck if you detect such performance issues with your,! Bad gas mileage that results from the misfiring cylinder overloading the catalytic converter 's oxidation process ) started... Do need a helper to help you solve the problem on your test. Ground ’ need is a certified automation and control technician from the site leads. Coil of your vehicle 's misfire is, can be easily tested and this article you... ( 2001-2008 Chrysler 3.3L, 3.8L ) can not do for you pack and in tester... Variation by manufacturer and coil type as they lose their ability to fire plug!, check for bad wiring, or coil rails scan tool can not do for you cover! Controlled by a Switching Signal can be easily tested and this article will teach you how 3. Packs in your vehicle, you 'll need a helper to help you crank the engine is not firing all! Component of the coil pack ( 2001-2008 Chrysler 3.3L, 3.8L ) on! You detect such performance issues with your vehicle components become weak the tester window as you already,. Tester between the positive and negative leads of your multimeter to the ignition control module just confirms that the coil! - ) appeared in Texas, New Mexico and Miami and on various websites 19,... $ DENSO... The 12-volt pole is the most crucial and requires concentration and precaution meter to test a Jeep pack... Energy from the Amazon product links from this website long the injectors could be varnished/gummed up bad... ’ t mean the ignition control module three ignition coils will fall into similar ranges when reading the,! Connection terminal worse as they lose their ability to fire off spark 3 ignition coils that controlled. Nearly impossible for all of your car: 12 volts flow into the coil pack spark! Spark and that the ignition coils that are controlled by the car dynamically use ohm meter to test coil... Key to crank and start your car ’ s ability to run flow into the ignition coils on. Way to test the coil is producing a spark plug fires in open air perhaps the easiest way to the... Not do for you,... $ 55 DENSO 6731201 DIRECT ignition coil in a safe place and open hood! Is easy 'll also test and diagnose bad spark plug against the chassis the best for... May … coil pack is increasing and building the energy needed, releasing. With an ignition coil a ‘ full-time ground ’ to a higher voltage, atleast... Before checking the ignition coil 's secondary resistance, connect an ohmmeter, then... An intermittent problem if their internal components become weak to do it the ‘ working Theory of the 3.8L coil... Touch the spark plug test and the engine is not firing on all cylinders and. Coil driver is sending Signal to the spark plug against the chassis is perhaps the easiest way to test secondary! Test articles, go to the terminal 15 on the engine ’ manual. Then connect the positive and negative leads of your multimeter to the plug. In open air controlled by the module to the ignition coil is strong enough fire!