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Vehicle will not start after replaceing ignition

Vehicle will not start after replaceing ignition coil

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  • tyroneholmes Jul 03, 2009

    need help please respond

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If your coil installation is correct. Get an OBD2 reader and clear your error codes. This may do it.

Posted on Jan 25, 2010

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I have a 1999 dodge Durango 4x4 with a 5.9 magnums v8. I've gone through 3 ignition coils in a 2 week span. Could it be just a bad "run" from the manufacturer? Or is there something I'm missing?


Hi Chris
I am not familiar with your particular vehicle. But...
The main reason that an ignition coil would fail is through an open circuit in the primary winding. (Use the ohms section of a multimeter to check for continuity) Now, the only way you can open circuit the primary winding is to burn out the primary winding.
Considering that this connects to 12 volts via the "points" or "contacts". There isn't much to go wrong.
So.... Here's what I think is happening.
From my old auto electrics background.... A coil connects to the vehicles 12 ignition circuit via a special nichrome wire (often inside the wiring harness) This Nichrome wire acts as a Resistor before the 12v current reaches the Coil's Primary winding. This cuts down the current when the the ignition key is in the running mode. When you start the vehicle, the full 12v current bypasses the resistor to give to a BOOST while starting the vehicle. When the key returns to the Running position the coil is being supplied by the resistance wire so the current is reduced.
Note: There would have been 2 wires connected to the Coil originally. One is 12v from ignition switch "run" position and one from ignition switch "start" position.
If you have wired the vehicle different than the original wiring or have used a different wire then you may actually be running the vehicle directly on 12v from the ignition/battery. This would eventually burn out your coil.
If necessary, add a resistor (large wire wound, ceramic), to the circuit. Purchase or make your own.... once you know how many ohms you require to reduce the current.
Hope this solves your problem. Pitty you have paid for 3 coils before finding out.

Cheers

Sep 14, 2016 | 1999 Dodge Durango

1 Answer

MITSUBISH LANCER ONE IGNITION COIL (BLACK/GREEN) NOT WORKING BUT SOMETIMES IT WORKS BUT AFTER STOPING THE ENGINE IT DOESNT RESTART


Evison: According to DoItYourself.com: " If your vehicle is behaving erratically and you have problems with it running smoothly, it could be showing signs of ignition coil failure. The ignition coil takes power from the generator and relays it to the spark plugs. This ignites the fuel and makes your vehicle run. The severity of the symptoms vary according to which of the ignition coils are failing.
Backfiring If your vehicle is backfiring, this can indicate early symptoms of a failing ignition coil. This occurs when unused fuel is emitted through the exhaust system. If you do not address the issue, you can also do serious damage to your exhaust, resulting in unnecessary and costly repairs. Your exhaust may emit a black smoke and you may even detect the smell of gasoline.
Starting Problems Check your high tension leads (HT Leads). These run between the distributor and spark plugs. Ignition coil failures result in one or more spark plugs not receiving the appropriate amount of charge. If you have trouble starting your vehicle in the cold, this is a good sign of potential ignition coil failure. You can run a simple test on the HT leads to check that there is in fact a spark going from each lead to each spark plug.
Fuel Economy If your vehicle is getting a lot less mileage for the gallon, This can also be a sign of ignition coil failure. When less power is reaching the spark plugs, your vehicle will struggle and use more fuel to compensate for the lack of power transfer.
Engine Misfiring Trying to start your vehicle when the ignition coils fail will result in a rough ride. Your vehicle will cough and splutter regularly and when you drive at higher speeds, your vehicle will jerk and spit. It will also vibrate when you are running idle at a stop sign or intersection.
Vehicle Stalling With ignition coil failure, your vehicle will have irregular sparks emitting to the plugs to keep it running. This will result in stalling. When you bring your vehicle to a stop, it may just shut off totally, thus leaving you needing to restart it.
Coil Failure If your spark plugs are worn out, it forces the ignition coils to operate at a much higher output. Keeping your sparks plug in optimum condition can reduce your chances of having ignition coil problems. Some simple regular maintenance will save you a lot of money in the long run.
If the gap in your spark plug widens due to normal erosion, it leads to an increased voltage being required to create a spark in the chamber. That increased voltage demands more current flow through the primary circuit and this increased current flow can overload the primary transistor. Keeping all these components in good running condition is also a big help towards keeping your coils in a good working condition."

May 25, 2015 | Mitsubishi Lancer Cars & Trucks

1 Answer

2007 ford edge engine missing they say coil pack and cost could be $1700.00. Is this possible?


it depends on how many coils are bad. pep boys auto parts lists them @ $301.99 each, for your vehicle, there will be a bit of a markup on the cost of the part, that is normal.
then there is the labor, job should take between 1/2 to 1 1/2 hours x labor per hour.
when I had mine replaced only the ones that needed to be replaced were done.
I took this from another site:
An ignition coil is a compact electrical transformer that boosts the 12-volt current from the battery into the high voltage (15,000-20,000 volts or more) needed to start a car. Typically there is one ignition coil for each spark plug, either sitting on top of each spark plug (eliminating the need for spark plug wires) or physically connected together as a coil pack that is installed and replaced as a single unit. Symptoms of a bad coil pack include misfires, poor fuel consumption or loss of power -- although these can be caused by other factors. Typical costs:
  • An ignition coil typically costs $70-$375 or more depending on the make and model of vehicle, if it is a single coil or a coil pack, and whether the part is made by the vehicle manufacturer (called OEM parts, and typically more expensive) or an aftermarket product from a company other than the vehicle manufacturer.
  • For example, AutoZone[1] offers an aftermarket ignition coil for a 2008 Ford Focus for $103; FordParts.com[2] offers ignition coils for the same vehicle for $72-$159. Replacing an ignition coil can be a relatively straightforward do-it-yourself project. AutoMD provides how-to instructions[3] , and estimates it as a moderately complex project that takes about an hour.
  • Professional installation typically takes 0.5-1.5 hours, depending on the vehicle, at $50-$120 an hour (depending on whether the work is done at an independent or chain repair shop, or at a dealership, which is typically more expensive). This brings total costs to $100-$550 or more.
  • For example, RepairPal.com[4] estimates replacing a single ignition coil on a 2008 Ford Focus costs about $37-$49 for labor and $123-$144 for parts, making a total cost of about $160-$193; for a 2008 Dodge Ram 1500 truck the estimate is about $102-$135 for labor and $74-$120 parts, or $176-$255 total; for a 2008 Toyota Camry it's $74-$98 labor and $102-$210 parts, with a total of $176-$308.

Dec 12, 2014 | 2007 Ford Edge

1 Answer

Initial start up the engine sounds like its running on 2 cylinders under powered intil the temp gauge reads normal ???? any body got the answer please


Cold starting misfires can often be caused by either tired high tension spark plug leads or ignition coil packs. If replacing leads, then replace with a full, new set. Coils can be changed individually, but it is often the case that if one has failed, then the others aren't far behind. Some cars have individual coil packs on each spark plug. Some cars have a single pack for all plugs and some have coil packs which may control two or more plugs.

To check for a misfire (ignition failure) follow these steps:

(Cold start) (Use a pair of insulated pliers)

1) Start the vehicle

2) When the vehicle starts misfiring, disconnect plug leads or coil pack connections one at a time. If the vehicle idles even more roughly, then that plug or pack should be considered fine.
Replug each connection before disconnecting the next one. Once you disconnect a plug lead or coil pack connection and find no difference in poor engine running, then you have likely found the offending cylinder. Check the spark plug condition, lead and/or coil condition and connections on that cylinder.

3) Replace components as necessary.

Oct 12, 2014 | Cars & Trucks

1 Answer

After receiving a tune up on my 4.2 cylinder 2003 Trailblazer 1 ignition coil is misfiring. It wasn't before the tune up. Why


There is little to tune up on this vehicle which would affect the ignition coil. The vehicle's ECU manages tuning functions.
Try replacing the ignition coil. This will not likely be an issue caused by regular maintenance unless the coil or wiring was damaged when attempting to remove the vehicle's spark plugs or leads.

Nov 01, 2012 | Chevrolet Cars & Trucks

1 Answer

I will be driving my 87 cougar down the road then it will start jerking lose speed and die. what is causing that?


here are a few symtoms of a BAD IGNITION COIL. the car will spit and sputter.
If your vehicle is getting a lot less mileage for the gallon, you can also register this as a sign of ignition coil failure. When less power is reaching the spark plugs, your vehicle will struggle and use more fuel to compensate for the lack of power transfer.
Engine Misfiring Trying to start your vehicle when the ignition coils fail will result in a rough ride. Your vehicle will cough and splutter regularly and when you drive at higher speeds, your vehicle will **** and spit. It will also vibrate when you are running idle at a stop sign or intersection.
Vehicle Stalling With ignition coil failure, your vehicle will have irregular sparks emitting to the plugs to keep it running. This will result in stalling. When you bring your vehicle to a stop, it may just shut off totally, thus leaving you needing to restart it.
Coil Failure If your spark plugs are worn out, it forces the ignition coils to operate at a much higher output. Keeping your sparks plug in optimum condition can reduce your chances of having ignition coil problems. Some simple regular maintenance will save you a lot of grief. hope this helps you out !

Sep 20, 2011 | 1987 Mercury Cougar

1 Answer

How to test ignition coils in ford escape


pull it off the spark plug, tip it upside down, put a known good spark plug in the coil, stand back, start the vehicle and look to see if the plug is sparking. DO NOT TOUCH IT WHILE THE VEHICLE IS RUNNING. always replace the spark plug when replacing a coil

Jun 13, 2011 | 2002 Ford Escape

1 Answer

Volvo 850gls 1994 starts and turns over normally but won't stay running, will start when car cools down


Hello and welcome to FixYa!

Looks like that the ignition coil is faulty. When the ignition coil is faulty the car tends to stall when engine is warmed up. I strongly suggest that you replace the ignition coil to resolve the problem. Not a big deal, it's common on all vehicle.

Hope this helps and thank you for using FixYa! Have a good one!

Apr 15, 2011 | 1994 Volvo 850

1 Answer

Where is the ignition module if i do decide to change it. I am gettimg some sputtering specially on start up


Your vehicle does have an ignition module. It's located under the ignition coil pack. (the 3 ignition coils) It's not cheap to replace. AND it's a bad guess as being the cause of your sputtering problem. Charlie

Jun 01, 2009 | 2001 Chevrolet Venture

1 Answer

1991 Mazda 626 DX dies suddenly after running for 10 minutes.


Hello, It sounds like an engine ignition control module gone out or a coil. They get hot and quit working after a short period of time, cool off then work again till they get hot.
Is the ignition system pointless electronic or does it have points? Are you getting any fire at all now to the cylinders? Does the tach in the vehicle show any RPM's during cranking? Do you have voltage at the positive side of the ignition coil? Does the coil meet the ohm ratings for that years vehicle ignition? Does the vehicle have oil in it so the oil pressure sensor allows the engine to run, this may not be an option on your particular vehicle? You can check most of this out with a volt/ohm meter. Check your voltages before starting the vehicle, during running and after it quits to see where the loss is. Just don't get near the center tap of the coil or you will get a rude awakening and/or serious injury. Good luck, RAC

Apr 05, 2009 | 2000 Mazda 626

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