The 3.0-ohm coil should be used on PerTronix Ignitors installed on four- … Your coil should have a reading of between 6,000 and 15,000 ohms for your Ford. Common Symptoms of a BAD Ford Coil-on-Plug Ignition Coils. Note the reading on the meter. The primary resistance was fine at 0.8 ohms, but all three secondary resistances were high at 15 K-ohms. Page 1 of 5: How to Test the Ford 4.6L, 5.4L Coil-on-Plug Ignition Coils. <> The Haynes manual specifies an acceptable range of 6.5-11.5 K-ohms. Note: If all of the ignition coils aren’t delivering spark, the issue is likely with the control side (primary side) of the ignition system, rather than a single ignition coil. ���� {���HX&G�4�A�����|�.�V��4�Uو/��%yP�RT�dV Place the test leads from the ohmmeter on the side terminals, one on each side. With ignition key on If there is no voltage, the ballast resistor is open or the ignition switch is bad. Accelerate going up hill or pulling out If the voltage is 12v the coil … �PF�-�u)�_P����c���7Q��JWoI2rݬv�Ħ��'�o���r� e�~�� I_ 5�+��S�+&o���~{}�b�.V{�g-�YW`"�ad�d��ME�9px 2 0 obj If you are not sure what yours should be, check with the dealer service department. I'm trying to diagnose a coil pack on a 2003 Mazda B3000 with the Ford 3.0 V6. endobj Isolate the battery cable so that it can not contact the battery. The coil simply transforms the power we supply into high voltage. stream While ignition coils will generally last for the life of a vehicle, faulty spark plugs or spark plug wires can send irregular voltage surges through the ignition coil, causing the coil to burn out. <> An ignition coil that has the wrong internal resistance often exacerbates this condition and leads to a poor-running engine for which you can find nothing wrong. Just as the title says, How do you test an ignition coil using an ohm meter? If you are looking to upgrade your stock coil, or want to compliment the performance of your MSD Blaster Ignition, MSD 5, 6 or 7, the Blaster Coil line is the right choice. Find the resistance specifications for your car's primary coil winding in your repair manual. endobj I need to know the coil resistance specs (primary and primary to secondary) for the coil used in a 98 Ford 4.6 litre that is equiped with the 8 individual coils. No External resistor required. endobj I bought a new pack and checked the primary resistance on it, and it measured the same thing. There are different ways of checking the ignition coil: Testing the resistance values of the coils using the ohmmeter. The specs I found show 0.3 to 0.9 so I figured this pack was bad. The coil looks like a black cylinder with a center wire similar to a spark plug wire and two side posts with nuts and wires attached. 3 0 obj This unit was a BWD unit. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Make sure to compare prices and take a look at the top user reviewed Ignition Coil products that fit your Ford. Tighten the nuts with a wrench and reinstall the large coil wire on the center terminal of the coil. Measuring the primary and secondary resistance requires an ohmmeter, and a digital readout is best if you have access to one. Most of that is being dissipated by the resistor. These windings are held secure and kept cool in an oil filled metal canister. Conventional coils read about 1.2 ohms. When the ignition coil driver is switched on, current rapidly builds up to a maximum value, determined by the coil inductance and resistance. Move the test lead from the negative post on the coil to the center terminal where the large wire was removed. endobj Spectra Premium ignition coils are designed and produced under a strict TS16949 quality control process. Christian Killian has been a freelance journalist/photojournalist since 2006. The severity of the symptoms vary according to which of the ignition coils are failing. <>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 5 0 R/Group<>/Tabs/S>> It does not matter which lead goes where in this case. <> This ignites the fuel and makes your vehicle run. It replaces: 8BA12029, D0PF12029A, D3PF12029AA, E8T12029BA. After many years of working in auto parts and service positions, Killian decided to move into journalism full-time. I read the primary resistance on the old unit and it read at 2.4 ohms. The haines manual says for the Coil over plug that the Primary resistance should be about 0.55 ohms and the secondary resistance should be about 5,500 ohms. 5 0 obj Our Blaster Coils are designed for improved spark output! Most ignition coils will fall into similar ranges when reading the resistance, but there can be some variation by manufacturer and coil type. As you know, the spark plugs are pretty important when it comes to starting up your engine. 1 0 obj You can test a 12-volt ignition coil for effectiveness by checking the resistance of its wire windings with a multimeter. p�l&��o�+�(����>� h�uB��AȜ�?>qT%���_�g6>��D��^�\���. If your vehicle is behaving erratically and you have problems with it running smoothly, it could be showing signs of ignition coil failure. Boot, 3-Valve, Ford, Set of 8 x��[�o�F�n���~�1�}���q)�kc�8�A�$��D�"�����,)��>�I$gfvw����|��������W��beDg�I�I�(N���5F�W�W�]_}������y�'�~��1�'E�� �e�F�ﮯb��������fb�q���� ��_¥�,����*����J ����i�r`L"���}���Z���=w��j���EQ�NM�J��������Ɣ�bl�( 6v�zڔ��F͞s=ۊ_W���7��,�s_��=X�d�8R=�߄��q�Xm�ý��h�⸔�u\*�|��@]ىXG�`_R�s�D�����WV���N�O��f�U��o� ����jnf�_�i_,�v����-3���涡r%r��':������� I��X�$C\f��g���Y\��I�+�Fr�Uzk��B.��Rg#�nɒ���� To test it disconnect the electrical connector from the coil assembly and connect an ohmmeter across the primary (+) terminal and the negative terminal. Save on cost when you find your Ford replacement Ignition Coil with us. In this case, it is wise to connect a voltmeter to the positive side of the coil to check the supply when the engine is operating poorly. Ford Coil - Six Volt - This Ignition Coil is an exact replica of the original used in Ford Tractors, 1950 to 1964. The ignition coils for Ford Escape take low-voltage, high-amp current from the battery and convert it to high-voltage, low-amp current that is usable by the spark plugs. The total ignition resistance in the 6 volt ignition system was about 2.2 ohms with the engine warmed up (1.7 ignition resistor HOT plus 0.5 coil). Ignition Coil 12 Volts Internal Resistor 2.7-3 ohm primary coil resistance, 28000 volt secondary 12 volt universal, oil filled ignition coil use on all 4-6-8 cylinder engines. I run a Pertonix billet distributor in my '65, but use a 1.4 ohm Accel Super Stock coil, which is designed to be compatible with point ignition systems using a resister wire (or ballast resister for you misguided Chevy people). The tool is installed inline with the ignition coil to determine if the coil is producing a spark. ����lV�[1�*��_��ilY�^��8E�Y�GY����B����Tx�u5�rF��z��7�.sp�?.�����j�J4 ��O\~��+��AD���~����D���xQFa�~ҰW�{�SA���K��=�)M�S�3ey��9��һ�JA���S�Tɀ�j�.��^�u5}��h� A better check is to ground the distributor terminal (coil minus) and then do a voltage check at the battery terminal of the coil. It just pushes in place, but make sure it is all the way in or it may come loose when the engine is running. Remove the negative battery cable from the battery with a wrench. Misfire Codes: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308. Copyright 2020 Leaf Group Ltd. / Leaf Group Media. Order Ignition Coils for your 2004 Ford F-150 and pick it up in store—make your purchase, find a store near you, and get directions. Or you can get an OEM-style 1.4 ohm coil, and leave the resister wire unmolested. %���� Ford note: The current flow, or dwell, through the primary ignition coil is controlled by the PCM by providing a switched ground path through the ignition coil driver to ground. Locate the coil on your Ford engine. If the readings are within range, reinstall the wires and retaining nuts on the side posts, being sure that they go back on in the same position they were in before you removed them. Stop by for the Ford Mustang ignition coil you need for assured performance every day. Also, mount the coil so the coil wire is as short as possible to keep resistance low. The primary winding of your ignition coil is the first to receive voltage from the battery, so we'll follow its lead and test the primary first. Replacing This coil did fix the misfire problem...also the truck would shake when under a load. Testing the COP coils in your 3.0L Ford Escape (or 3.0L Mazda Tribute) can be a challenge, since three of them are under the intake manifold plenum (this article can be applied to several other 3.0 Ford models).The three that are underneath the intake plenum are the COP coils for cylinders #1, #2 and #3 (cylinder #1 is the one closest to the serpentine belt). Remove the large wire from the center of the coil by pulling it straight out of the coil. It works perfectly. Based on those values, our ignition circuit will be consuming about 24 watts of power when the points are closed. Caution: Coils that have an internal power transistor are NOT compatible with MSD Ignition Controls. 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. A power supply of 6 volts at 1.5 ohms resistance is the same as 12 volts at 3.0 ohms resistance. The coil wire connection has a longer snout and will require some modifying of most wire sets. Right now, 6 are giving me readings alike, but 2 are not giving me a reading from primary to secondary at all. Replace the coil with a new one if the readings are outside either of these ranges, as that would indicate a defective coil. %PDF-1.5 Connect your multimeter to the positive terminal or pin of your coil, and to the high output terminal that goes to the spark plug. Remove the large wire from the center of the coil by pulling it straight out of the coil. Check here for special coupons and promotions. I recently changed my spark plugs and wires and while I was at it I checked the resistances on my coil pack in accordance with the Haynes manual. Odg�x@�0:�N.Br�uO�f�QCʲ��)��K�R2�i�ɣRYQ�g*��O���>-ڽr�F��AB�m��� <> Step 1. He has been published in "1st Responder News" as well as in other trade magazines and newspapers in the last few years. These are gener - ally found on late model DIS or coil-per-cylinder ignitions. (Part No: 8BA12029) $36.71 Ignition Coil by Spectra Premium®. Note the resistance reading on the ohmmeter. Keep the other lead on the positive post of the coil. At Advance Auto, we carry 341 different types of Ignition Coil products for your Ford at competitive prices to fit your budget. Remove the retaining nuts and all the wires attached to the side terminals on the coil as well. Use of any coil that is not compatible may damage the MSD and void the warranty. Ignition Coil, Coil-on-Plug, Modular, 75:1 Turns Ratio, 21,000 Volts, Black and Red, 4.6L, 5.4L, 6.8L, Brown 4.500 in. "Ignition coil primary resistance = 0.5 to 0.9 Ohms Ignition coil secondary resistance = 5K to 10K Ohms" Today, I measured the secondary of one of my coils (did not remove the coil from the engine) and I measured 6.24K Ohms from tower to tower. ��;�A� S*���\�hi;mONn-�����'�U���Q���qX�kq�KuS!�������0�R{aN��8�y�=�f�`�5�)��E6�r��>H1*B�,��� ��n(ɍ��^��}���8��b)c��2��EI^YqHP� … This is the primary resistance, and it should read between .4 and 2 ohms on your Ford coil. An absence of spark from just ONE ignition coil points to a bad coil. I re-read the manual page I looked at (a little too fast apparently) and realized that while its instructing you to measure the resistance across the ignition coil, the purpose of that test is to check the kill switch, not the coil. The Flame Thrower 40,000V coils have internal resistance rated at 1.5 or 3.0 ohms. Special 100:1 windings are used to provide maximum build-up of voltage! The 0.2 ohm spec is for the kill switch, not the coil primary resistance. 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Ltd. / Leaf Group Media, P0304, P0305, P0306 ford ignition coil resistance specifications P0307,.. Of the coil simply transforms the power we supply into high voltage a coil pack on a 2003 Mazda with.