Any reasons why a ignition coil would go bad in under a year? - JeepForum.com
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post #1 of 30 Old 09-10-2019, 05:07 PM Thread Starter
sirstvjesse
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Any reasons why a ignition coil would go bad in under a year?

Hey all, I have a 1994 ZJ Jeep Grand Cherokee 5.2l and about a year ago I replaced the coil just because I tuned up the Jeep all the way around. Yesterday I was driving and the car died and wouldnít start. I towed it home to work on it. I saw there wasnít any spark and replaced the coil and it works fine. I was wondering what couldíve caused it to fail so fast. I wanted to make sure Iím not missing anything that may cause the new one to fail.


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post #2 of 30 Old 09-10-2019, 05:19 PM
jeeepguy
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Brand, manufacturing error, bad luck...

"Si Vis Pacem Para Bellum"

"Great danger lies in the notion that we can reason with evil"
Doug Patton
Quote:
...We use words like honor, code, loyalty. We use these words as the backbone of a life spent defending something. ...I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the blanket of the very freedom that I provide, then questions the manner in which I provide it. I would rather you just said thank you, and went on your way, Otherwise, I suggest you pick up a weapon, and stand a post...
Quote:
I bought the HI-WAY BLASTER HORN that's 139dB and every time I honk the horn an Angel dies.
Quote:
Revelation 13:16-18
16 - He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads,
17 - and that no one may buy or sell except one who has the mark or the name of the beast, or the number of his name.
18 - Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: (Real ID and RFID chips)
Think about it...
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post #3 of 30 Old 09-10-2019, 05:20 PM Thread Starter
sirstvjesse
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Originally Posted by jeeepguy View Post
Brand, manufacturing error, bad luck...


Yeah I get that. Was just wondering if anything leading to the coil couldíve lead to itís demise.


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post #4 of 30 Old 09-10-2019, 05:25 PM
jeeepguy
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Coils typically fail due to either vibration or age... other external factors usually don't affect them.
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"Si Vis Pacem Para Bellum"

"Great danger lies in the notion that we can reason with evil"
Doug Patton
Quote:
...We use words like honor, code, loyalty. We use these words as the backbone of a life spent defending something. ...I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the blanket of the very freedom that I provide, then questions the manner in which I provide it. I would rather you just said thank you, and went on your way, Otherwise, I suggest you pick up a weapon, and stand a post...
Quote:
I bought the HI-WAY BLASTER HORN that's 139dB and every time I honk the horn an Angel dies.
Quote:
Revelation 13:16-18
16 - He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads,
17 - and that no one may buy or sell except one who has the mark or the name of the beast, or the number of his name.
18 - Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: (Real ID and RFID chips)
Think about it...
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post #5 of 30 Old 09-10-2019, 05:33 PM Thread Starter
sirstvjesse
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Originally Posted by jeeepguy View Post
Coils typically fail due to either vibration or age... other external factors usually don't affect them.


Thanks!


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post #6 of 30 Old 09-10-2019, 05:52 PM
CJ7-Tim
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Installing cheap quality parts or making the coil work too hard is a major source of failure:

  • wrong spark plug gap
  • wrong spark plugs
  • damaged or worn out spark plugs
  • bad plug wires
  • moisture intrusion
  • excessive vibration

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #7 of 30 Old 09-10-2019, 05:54 PM Thread Starter
sirstvjesse
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Quote:
Originally Posted by CJ7-Tim View Post
Installing cheap quality parts or making the coil work too hard is a major source of failure:
  • wrong spark plug gap
  • wrong spark plugs
  • damaged or worn out spark plugs
  • bad plug wires
  • moisture intrusion
  • excessive vibration


I did change to high quality spark plugs, wires, distributor rotor and cap, along with the coil.


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post #8 of 30 Old 09-10-2019, 05:57 PM
CJ7-Tim
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What brand/type/part number spark plugs ?

Most auto parts stores sell cheap crappy Chinese made parts, some that even come with a "Lifetime Warranty". These parts are poorly manufactured and/or made from inferior materials. They are often out of specification, or even failed, right out of the box. The ones that are not faulty many times will have a short service life before they fail. Always buy top quality replacement parts and genuine Jeep engine sensors. Numerous threads detail long and frustrating searches for a "problem" that ended up being cured simply with genuine Jeep repair parts.

YMMV.
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.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #9 of 30 Old 09-10-2019, 05:59 PM Thread Starter
sirstvjesse
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Quote:
Originally Posted by CJ7-Tim View Post
What brand/type/part number spark plugs ?

Most auto parts stores sell cheap crappy Chinese made parts, some that even come with a "Lifetime Warranty". These parts are poorly manufactured and/or made from inferior materials. They are often out of specification, or even failed, right out of the box. The ones that are not faulty many times will have a short service life before they fail. Always buy top quality replacement parts and genuine Jeep engine sensors. Numerous threads detail long and frustrating searches for a "problem" that ended up being cured simply with genuine Jeep repair parts.


This sounds probably the most likely. The replacement I put in I got at Napa so hopefully it lasts.


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post #10 of 30 Old 09-10-2019, 07:24 PM
StPaul59
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I'm guessing it wasn't a Mopar coil... Or MSD lol
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post #11 of 30 Old 09-10-2019, 07:26 PM Thread Starter
sirstvjesse
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Originally Posted by StPaul59 View Post
I'm guessing it wasn't a Mopar coil... Or MSD lol


Said OEM but that doesnít seem as reliable these days. I wonder who makes (and where) their parts Lol


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post #12 of 30 Old 09-11-2019, 07:50 AM
LordHobbit
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I had a Napa coil last 8 miles. Yep, 8 miles. I don't go to Napa for any reason. Rarely have I had good parts or service from them.

MSD coil lasted about 6 months, and the Accel coil lasted about a year. I've had the cheap "lifetime warranty" coil on now for about 10 years.
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93 red ZJ 196k 4.0. Spent more money than I should have ...
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post #13 of 30 Old 09-11-2019, 08:15 AM
CJ7-Tim
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I have a 3 Cherokees, a 98, a 99 and an 00. Each has the original coil. Should any one of them need another coil, I will buy a new genuine Jeep part, or go to the junkyard for a good used genuine Jeep part.

Even with a "Lifetime Warranty" I don't want to spend the rest of my lifetime either worrying about getting stranded, or replacing the same darn part every few years. Cheap parts are cheap for a reason.

YMMV.
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.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #14 of 30 Old 09-11-2019, 09:09 AM Thread Starter
sirstvjesse
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Originally Posted by LordHobbit View Post
I had a Napa coil last 8 miles. Yep, 8 miles. I don't go to Napa for any reason. Rarely have I had good parts or service from them.

MSD coil lasted about 6 months, and the Accel coil lasted about a year. I've had the cheap "lifetime warranty" coil on now for about 10 years.


Great...good to no. I found me a mopar one and as soon as it comes Iíll change it


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post #15 of 30 Old 09-11-2019, 09:10 AM Thread Starter
sirstvjesse
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Originally Posted by sirstvjesse View Post
Great...good to no. I found me a mopar one and as soon as it comes Iíll change it


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*know...early sorry


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