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Daniel Banks Posted on Dec 16, 2010

I'm not getting spark from the coil. How do I check the coils resistance, and what are the tolerances?

1 Answer

nicknemitz

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  • Contributor 12 Answers
  • Posted on Sep 11, 2013
nicknemitz
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The coil could just be bad and need to be replaced

5 Related Answers

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Nov 11, 2008

SOURCE: 1990 dodge shadow wont start no spark from coil

THERE IS A STATOR IN THE DISTRIBUTOR, THIS IS THE SAME AS A CRANK SENSOR, HAVE YOU CHANGED IT?

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Molson02536

Harvey N Tawatao

  • 3854 Answers
  • Posted on Jul 01, 2009

SOURCE: 1995 Ram 1500. Just died? No votage to coil, no spark?

The power supplied to the fuel pump, ignition coil, fuel injectors and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD):
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump,ignition coil, injectors and those parts of the power module.  This causes the engine to shut down.

Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump.  Hope this helps, and did you try to retrieve any DTC codes?? Be glad to help friend.

Anonymous

  • 4669 Answers
  • Posted on Jul 25, 2010

SOURCE: 318 dodge 1500 no spark new coil still no spark

Sounds like a bad crank sensor.

Anonymous

  • 37 Answers
  • Posted on Nov 08, 2008

SOURCE: 93 mazda mx6 (v6) no spark.

Coil resistance is not a good way to determine if the coil is good or bad. It might still need replacing. Check to see if your getting a pulse signal to the coil. You can do this by hooking a milivolt test light to the trigger wire and ground. If it doesn't flash as you crank the motor, check out your pickup coil in the distributor. Some of them you can change. Some you have to replace the entire distributor. Sometimes oil will leak into the distributors on certain models which use an optical pickup. If this is the case, change the seal to fix the oil leak and GENTLY clean the optical sensor and photo wheel.

Anonymous

  • 2920 Answers
  • Posted on Jan 14, 2009

SOURCE: misfiring

if it were the cranksensor it would not start at all.you would have no fire.

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0helpful
1answer

No spark from coil to distrubuter

Disconnect the ignition coil output wire at the distributor cap.
Connect a spark plug to the end of the ignition coil output wire which you just disconnected.
Connect a ground wire to the threaded portion of the spark plug.
Disconnect the ignition coil ground wire from the negative terminal on the coil (Green Wire).
Connect one end of a ground wire to the ignition coil negative terminal.
Turn the ignition switch to the ON position.
Tap the other end of the ignition coil ground wire jumper on an good grounding point (for example the battery negative terminal) and look for sparks at the spark plug that correspond to the frequency of your tapping of the ground wire.
If you have a good spark at the spark plug, the ignition coil is good.
If you don't get a good spark, check for approximately 12 VDC from the coil positive terminal (black wire) to ground with the ignition switch in the ON position. You should also get approximately 12 VDC from the coil negative terminal (Green wire) to ground
Ignition Coil Resistance Check

In addition to the test above, you may elect to perform an ignition coil resistance check as confirmation of the coil's condition.

Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The resistance should be 0.4 to 0.6 ohms.
Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. The resistance should be 5000 to 7200 ohms.

You may have a bad coil or bad ground or wire connection
0helpful
1answer

How do I test my 2002 jeep liberty coil ignition. I need to find out which one is bad

Use a multi-meter, turn it to ohms, and check the resistance in the coil circuit. All should be similar- showing resistance of only a few ohms, typically. High resistance in the circuit indicates a bad coil.

Or you could just check for spark on each coil to plug wire. Check the spark at each plug wire end terminal with the engine cranking over. If spark is a strong, blue spark, that coil is probably good.
0helpful
3answers

No start on 1995 Camaro Z28 with LT1 5.7 6 speed. It's got fuel, new fuel pump with all the fixings, new icm, ignition switch, ignition coil, opti spark with distibutor, and still won't start. It ran for...

A bad wire on starter. Bad hot wire to distributor. Both could cause no spark. Check for power at distributor. If that's good check for bad wires at starter. Those are first to check. Will check in for what you got in a bit. Hope this helps ya

Iā€™m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

0helpful
1answer

Test coil pack

You can test the pack. Not sure what the tolerances for this particular pack are, but the Primary should read in the .3-.9 ohm range and the secondary usually usually 1.0-9.0 ohms range. If you get some resistance at all, it is likely not bad. If there is zero resistance at either primary or secondary, it is probably bad and needs replacing,
0helpful
1answer

1998 dodge stratus 2.5 s.ix cyl. no spark. only 4.09 volts coming from orange and green wires on distributor no voltage from feul injecter wires.

check the ignition coil or coil pack of their resistance,
primary must have 1.0 ohm to 0.5 ohms(tolerable).
secondary are between 900 ohms to 12,000 ohms
0helpful
1answer

No fire to the coil

You will not get spark from the coil . The spark comes from the spark plug wire Check the coil resistance with a hand held ohm meter and check for resistance . If ok check your distributor to see if it is functioning. You can get a very good Chilton repair manual for about twenty dollars. It is a very good book that will help you with the problem.
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1answer

My 92 dakota is not getting any spark

Engine Fails To Start

The "Checking For Spark'' test should be performed prior to this test.

This is a basic test of the ignition system that systematically examines the battery, the coil, the engine controller, and its wiring harness and connections; the most likely culprits in a no-start condition at this stage.
88472304.gif

Fabricate this special jumper with a 0.33 MF capacitor in-line to test the ignition coil
Click to Enlarge

  1. Unplug the ignition coil harness connector at the coil.
  2. Connect a set of small jumper wires (18 gauge or smaller) between the disconnected harness terminals and the ignition coil terminals.
88472314.gif

Terminal locations on the engine controller 14-way connector-1989 models
Click to Enlarge 88472305.gif

Engine controller 60-way connector-relevant terminals for testing are shown numbered
Click to Enlarge

  1. Attach one lead of a a voltmeter to the positive (12V) jumper wire. Attach the negative side of the voltmeter to a good ground. Measure the voltage at the battery and confirm that enough current is available to operate the starting and ignition systems.
  2. Crank the engine for five seconds while monitoring the voltage at the coil positive terminal:
    1. If the voltage remains at zero, diagnosis of the fuel system should be performed. Also check the engine controller and auto shutdown relay.
    2. If voltage is at or near battery voltage and then drops to zero after one or two seconds of engine cranking, check the engine control module circuit.

WARNING

The ignition must be turned OFF prior to unplugging the engine controller connector. If it is not, electrical surging could occur causing damage to the unit or other electrical components in the vehicle.

  1. If the voltage remains at or near battery voltage during the entire five seconds, turn the ignition key OFF. Remove the 14-way connector on 1989 models, or the 60-way connector on 1990-96 models at the engine controller. Check the 14-way or 60-way connector for any spread terminals.
  1. Remove the test lead from the coil positive terminal. Connect an 18 gauge jumper wire between the battery positive terminal and the coil positive terminal.
  2. Make a special jumper cable (see illustration). Using the jumper MOMENTARILY ground terminal 12 on the 14-way connector (1989), or terminal 19 (see illustration) of the 1990-96 60-way connector. A spark should be generated at the coil wire when the ground is removed.
    1. If a spark is generated, replace the engine controller computer.
    2. If no spark is seen, use the special jumper to ground the coil negative terminal directly. If spark is produced, repair the wiring harness for an open circuit condition. If spark is not produced, replace the ignition coil
    this is for distributor ignition
THIS IS TESTING OF DISTRIBUTORLESS IGN
Testing

This procedure requires an ohmmeter to test the coil packs for primary and secondary resistance (specifications are given for an ambient temperature of 70-80°F/21-27°C).
88472320.gif

The two coil packs contain five independent coils, which fire paired cylinders (shown numbered)
Click to Enlarge

  1. Disconnect the negative battery cable.
  2. Determine the manufacturer of the coil. It should be labeled either a Diamond or Toyodenso.
88472779.gif

Location of critical terminals for checking the coil primary resistance-V10 engine front coils
Click to Enlarge 88472780.gif

Location of critical terminals for checking the coil primary resistance-V10 engine rear coils
Click to Enlarge

  1. Check the secondary resistance of each individual paired coil by connecting an ohmmeter across the coil towers. This must be done between the correct cylinder pairs: 3/2, 7/4, 1/6, 9/8, or 5/10. Resistance for a Diamond coil should be 11,300-15,300 ohms. For a Toyodenso manufactured coil pack, resistance should be 11,300-13,300 ohms.
88472323.gif

Use an ohmmeter to check secondary resistance as shown

  1. Check the primary resistance of the front coil pack by attaching an ohmmeter between the B+ coil terminal and either the right (cylinders 3/2), center (cylinder 7/4), or left coil (cylinders 1/6) terminals. Resistance for a Diamond coil should be 0.97-1.18 ohms. Resistance for a Toyodenso coil should be 0.95-1.20 ohms.
  2. To test the primary resistance of the rear coil pack, attach an ohmmeter between the B+ coil terminal (see illustration) and either the right (cylinders 9/8), or left (cylinders 5/10) coil terminals. Resistance for a Diamond coil should be 0.97-1.18 ohms. Resistance for a Toyodenso coil should be 0.95-1.20 ohms.
i hope this helps any more questions repl if help at all plz vote or comment me
0helpful
1answer

Dodge neon 1996.it has no spark.already le intal crank position sensor and cam sensor.and yet has no spark.that may be.

remove electrical plug from coil,with test light check tosee if u are getting power to the coil with the key on.(remove fuel relay during the testing) if there is power to coil then check resistence on coil. with plug still disconnected.take ohm meter and connect to the two outside plugs to check ohm resistance 0.45 - 0.65 ohms then use ohm meter to check secondary resistance.connect ohmmeter across the two secondary terminals of each coil. resistance 11.5-13.5 k-ohms. if all checks out test wires and plugs. hope this will help!!!
0helpful
1answer

Stalled while driving, now will not start and run.

check with inline spark tester between the coil and the plug wires for fire. also check the sparkplugs for a fouled out condition. if all checks out then check the coil with ohm meter. unplug the ignition wire connector from the coil. there should be 3 terminals on the coil. connect the ohm meter to the center pin and the other to either outside pin to check primary resistance. then using the ohm meter check the secondary resistance by connecting one end of ohm meter one tower on coil and the other end of ohm meter across to the opposite side of coil to check resistance. primary resistance--0.95- 1.20 ohms secondary resistance-- 11,300 to 13,300 ohms. if it does not check out then replace the coil.
0helpful
2answers

1996 hyudai accent

CHECKING IGNITION COILS
1. Measurement of the primary coil resistance. Measure the resistance between connector terminals 3 and 1 (the coils at the No. 1 and No. 4 cylinder sides) of the ignition coil, and between terminals 3 and 2 (the coils at the No. 2 and No. 3 cylinder sides).
54c280c.gif

2. Measurement of the secondary coil resistance. Measure the resistance between the high-voltage terminal for the No. 1 and No. 4 cylinders, and between the high-voltage terminals for the No. 2 and No. 3 cylinders. Be sure, when measuring the resistance of the secondary coil, to disconnect the connector of the ignition coil.959e0ec.gif


ebc094e.gif


CHECKING SPARK PLUG CABLES 1. Check the cap and outer shell for cracks. 2. Measure the resistance Spark plug cable (SOHC)
Resistance should not be higher than 10,000Ω per foot of cable. If resistance is higher, replace the cable.
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