New Coil Pack was JUNK. - Jeep Cherokee Forum

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New Coil Pack was JUNK.

Old 01-27-2019, 11:58 PM
  #1  
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Default New Coil Pack was JUNK.

Well, the old '04 WJ 4.0 was running a little rough, decided it was time for new plugs. I pulled the coil pack and plugs. Plugs were clean, nice and white, but electrodes had worn alot and gap was at .050.
New NGK V-Power's and a new coil pack that I got from RockAuto, Standard Motor Products, part # UF296 and....it's total junk. Two cylinders were dead, Jeep barely ran, had to remove it and reinstall the old coil pack.
Now, with the old coil pack in place, the old girl's running very well again.
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Old 01-31-2019, 03:09 PM
  #2  
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Year: 1989 Laredo
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Current parts quality is so very very disappointing?
If your a manufacturer making a part, is it any more difficult to make it right?
IMHO parts from across the great sea must be the best parts. They never make any bad parts. They ship everything 100%, no scrap at those factories.
Stated with the utmost sarcasm.
But what are you supposed to do. You go the three parts supply stores and you have three or four brands to choose from. However all those brands come from common source. Are we really only selecting which coloured box we like best?
I'm not claiming to be perfect. I've purchased based only on price point. I deserved what I got. However there is not always a choice of good vs junk brands.
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Old 02-05-2019, 03:40 PM
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I bought on rockauto, and went with the brand that supposedly is the buyers favorite choice. Thankfully it had a 3 year warranty and rockauto sent me a replacement one (after I paid to ship the junk one back). So, we'll see how it goes. Also, the NGK v-power plugs I put in are coming out, and I'm going back to champions. The old WJ idles like [email protected] with the NGK's.

Last edited by Kymasabe; 02-05-2019 at 03:43 PM.
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Old 02-06-2019, 06:31 PM
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I changed out the old high mile NGK’s in my ‘03 WJ 4.0 a short time ago, had a worsening bobble while idling, although overall performance and fuel consumption was good. Old plug electrodes were worn but clean, gaps were at .049 Replaced with brand new NGK v-power ZFR5N, gapped at .035 per spec. Mileage and performance improved somewhat, but I still have a slight bobble at idle, yet OBD2 displayed no fault codes. Let us know if a change to Champions cleans up your idle, I’m a bit curious, as I’ve had good luck with NGK’s and have been using them for a very long time in all my vehicles.
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Old 02-11-2019, 03:08 AM
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Once my 4.0 started to use some oil, Champs became a problem staying clean. I got much better performance from NGK ZFR5Ns.
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