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No spark from coil pack - Harley Davidson Motorcycles

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Hi Anonymous, on twin cams make sure both spark plugs are in heads and use a grounded third plug to check for spark or hold spark plug cable close to spark plug in head. If still not getting spark the usual suspects are:
1. Fouled spark plugs.
2. Battery voltage below 8.7 volts, loose or broken battery cables especially ground cable to frame.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, MAP or BAS sensor.
7. Faulty ignition switch.
For a prime suspect please visit the website below:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley... Good luck

Posted on May 08, 2015

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Posted on Jan 02, 2017

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3 Answers

What is a coil pack on a car


A coil pack is the modern-day equivalent to an older vehicle's ignition coil (which provides electrical spark for all of the spark plug wires when combined with a distributor, distributor cap and rotor). However, one coil pack usually only drives 2-4 spark plug wires or boots (though some drive 6). In some cases 1 coil-on boot configuration is used and no spark plug wires are present. In this case the vehicle may use one coil per spark plug. Basically, a modern V8 will require 2-8 coil packs to provide spark for combustion, where'as an older V8 would usually only have one ignition coil. A four-cylinder vehicle will usually have 2-4 (depending on whether or not it utilizes a coil on boot configuration). Some V6 vehicles use 1 coil pack for all 6 cylinders and the top resembles that of an older distributor cap, with connections for spark plug wires. Many V6 configurations use 3 coil packs. Coil packs should be replaced every 60,000-100,000 miles with a full tune-up, or as need. They are expensive, but they help your vehicle operate efficiently and are good for the environment.

Sep 01, 2014 | Vehicle Parts & Accessories

1 Answer

2006 Suzuki forenza no fire from coil pack


what country? this is the WWW, post country for better answers.......!
Only a scope can see the fast 5mS signals to the coil.
so its either the coil pack or the ECU blown. (wires are always suspect)
you never said , all 4 are dead, or 1 or 2, and how many packs.
some non usa cars have wasted (2pak) spark , not 4 COPS.
state what cylinders have spark and which don't.
there are only 2 ways to fix cars.
1: guess and swap parts
2: use tools. my guess is you dont have them.
some coil packs are active (ignitor inside) others just a coil.
you can test the restance of the coils, with a DMM , ohm meter.
if active you cant.
the fsm covers this on all cars.
https://suzukipitstopplus.com/category/3-suzuki-service-manuals.aspx
the 2006 Forenza as delivered to USA has.....
has a large single, dual wasted spark coil pack. (brick)
it does in fact have , internal ignitor drivers. inside. so can not be tested
with and ohm meter on the primary side. but can be on the secondary
you do know how to test wasted spark , right, All spark plugs must be
attached and grounded for the coil to work,
1and 4 are shared.
2 and 3 are shared.
so to test , you must keep the spark plugs (both or all 4 is best)
attached and the shells of spark plugs grounded.
there is a fuse that powers the coil pack. (usa)
the fuel pump relay sends power to the coil pack.
so of that is dead,so will be the pack. (im reading FSM as it type)
get an FSM.
pin 2 on coil pack is power. 12v.
pin 1,is spark 1&4 drive (fast ECU pulse)
pin 3 is 2&3 coil drive. (scope can see it)

recap, are you using the correct wasted spark testing method.
and are all 4 spark plugs dead.?

Feb 18, 2013 | Suzuki Forenza Cars & Trucks

2 Answers

I dont have any spark. have power to the coil pack just nothing past that. what to do??


Check the crank shaft postioning sensor. If you are getting power to the coil pack and there is no power coming out of the coil pack the coil pack might be bad or have corrioson between the coil pack and the mount. Thanks

Mar 07, 2011 | 1999 Mitsubishi Eclipse

1 Answer

I GOT NO FIRE ON THE PLUGS


The spark gets power to spark from coil packs.If the connection between coil pack to spark plug is weak or loose then it will not fire.But if the coil pack as well as the connection between coil pack to spark plugs checked ok then its faulty or dirty spark plugs.Clean the spark plugs with the carb cleaner liquid and let it completely dry.Then check.Also check the voltage between coil pack to spark plugs.If both checked out ok then the other possibility can be weak crank shaft sensor. Thanks.Helpmech.

Nov 12, 2010 | 1995 Dodge Dakota

1 Answer

Ok I have 2002 Jeep Grand Cherokee, I have replaced the spark plugs and the coil rail but still getting the code P0351 and I was wondering if this could be caused by some kind of sensor?


The code indicates the coil pack or spark plug is malfunctioning. You can test this using an additional person. by removing the coil pack and spark plug, place the spark plug into the coil pack and ground the tang on the spark plug to the engine. Have someone start the engine and watch for a blue spark. if there is no spark, then the coil pack is malfunctioning. There is also ways to check the coil packs using a multimeter.

also, bee sure you didnt crack the ceramic part of the plug during initial installation.

Aug 01, 2010 | 2002 Jeep Grand Cherokee

1 Answer

No spark runns fine then loses spark wait 10 minutes starts


The spark plugs receives power to spark from coil pack.Check the power at the coil pack and also check the voltage at the coil pack with meter.If the coil pack shows proper power as well as voltage then its fault in spark plugs.Otherwise its faulty coil pack.The coil pack receives power from battery.so also check the voltage of the battery it should be exact 12 volt.
If the battery shows low voltage then the battery needs to be re-charged.
Then check out.
Thanks. you can rate this solution and show your appreciation.

May 20, 2010 | 1992 Pontiac Bonneville

1 Answer

Dont know how to take master cylinder off to replace coil pack


You shouldn't have to remove it....here are the steps from the tech manual:

Removal & Installation
  1. Disconnect the negative battery cable.
  2. Label and disconnect the spark plug wires from each of the coil pack towers.
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Ignition coil removal—2.4L engine

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Ignition coil removal—3.3L and 3.8L engines


  1. Disengage the electrical connector from the ignition coil pack.
  2. Remove the coil pack mounting fasteners.
  3. Remove the coil pack from the vehicle. If equipped, remove the coil pack from the mounting bracket.
To install:
  1. Place the coil pack into position on top of the engine valve cover, or mounting bracket, if equipped.
  2. Install and tighten the coil pack mounting fasteners to 9 ft. lbs. (12 Nm).
  3. Plug in the electrical connector to the ignition coil pack.
  4. Connect each spark plug wire to each corresponding coil pack tower. The coil pack towers are numbered with the correct cylinder identification. Be sure that the spark plug wires snap firmly onto each coil tower.
  5. Connect the negative battery cable.

Jan 18, 2010 | 2001 Chrysler Voyager

3 Answers

Ignition module where do I find it.


The ignition coils are mounted on it. Just follow the spark plug wires.

Nov 18, 2009 | 2005 Chevrolet Impala

1 Answer

How do i plug in the spark plug coils? what order?


If it's the four cyl., the first coil pack bolts over the #2 spark plug. The #2 coil pack wire plugs into #3 spark plug. The number two coil pack bolts directly over the number four spark plug, and the #2 coil pack wire plugs into the #4 plug. The firing order is 1-4-2-3.

Jun 30, 2009 | 2000 Mazda Protege

1 Answer

Not getting spark


Testing the coil packs.

1. Get an INSULATED wire and hook it to a ground on the car.
2. Get some one to help you
3. pull a spark plug wire off the coil
4. hold grounded wire close to, but not touching, the part where the spark plug wire connects
5. keep hands away from coil and have your helper turn the engine over ( start car and turn off)
6. if there was a spark between the wire and the coil pack it is good. if not, the coil pack needs replaced
7. replace the spark plug wire
8. test the rest

Apr 22, 2009 | 2003 Mitsubishi Galant

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