Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!

New Coil Pack was JUNK.

Old 01-27-2019, 10:58 PM
Seasoned Member
Thread Starter
Join Date: Oct 2012
Posts: 283
Model: Cherokee
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'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.
Kymasabe is offline  
Old 01-31-2019, 02:09 PM
CF Veteran
peep's Avatar
Join Date: Oct 2010
Location: Ontario, Canada
Posts: 2,137
Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 L 6 Renix

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.
peep is offline  
Old 02-05-2019, 02:40 PM
Seasoned Member
Thread Starter
Join Date: Oct 2012
Posts: 283
Model: Cherokee

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 02:43 PM.
Kymasabe is offline  
Old 02-06-2019, 05:31 PM
Junior Member
Bearstream's Avatar
Join Date: Jun 2015
Location: So Cal
Posts: 84
Year: 2003
Model: Grand Cherokee(WJ)
Engine: 4.0L

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.
Bearstream is offline  
Old 02-11-2019, 02:08 AM
CF Veteran
dave1123's Avatar
Join Date: Nov 2010
Location: Manlius, east of Syracuse, NY
Posts: 11,084
Year: 2000
Model: Grand Cherokee (WJ)
Engine: 4.0L

Once my 4.0 started to use some oil, Champs became a problem staying clean. I got much better performance from NGK ZFR5Ns.
dave1123 is offline  
Related Topics
Thread Starter
Last Post
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
08-11-2014 07:48 AM
Test Section
11-03-2013 05:31 AM
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
03-30-2012 06:26 PM
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
03-03-2009 05:04 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Search this Thread
Quick Reply: New Coil Pack was JUNK.

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title: