Jeep JK Forum This Forum is for the X, Sahara, Rubicon and Unlimited versions of the Jeep Wrangler JK. Introduced in 2007 the JK is the latest variant of the infamous Wrangler.
Sponsored by:
Sponsored by:

2009 jku p0302

Old 02-08-2015, 04:51 PM
Junior Member
Thread Starter
Join Date: Jun 2011
Location: Mascouche
Posts: 2
Default 2009 jku p0302

2009 JKU

Got P0302 with check engine flashing while driving back home on highway Friday. No other codes.

Replaced all 6 spark plugs and wires (because I had them anyway- wanted to change in spring).

Spark plugs and NGK LZTR5AIX-13, checked gap 0.50 all. Old plugs were anywhere between 0.60-0.70. Looked like the original Champion plugs.

Still same problem. Rough idle, lack of power, same code. P0302 Cylinder 2 misfire. No other codes.

I don't have the stuff to do a compression check so that's a no.

Someone suggested to check coil pack. Not sure how but here is what I got so far.

Got the coil pack out on the bench.

Looking at the coil pack. ASD relay pin is the 2nd pin from left to right? or 3rd pin from left to right?

assuming pins are 4 3 2 1 (on the coil pack)

3 to 4 0.9 Ohm
3 to 2 0.9 Ohm
3 to 1 0.9 Ohm

2 to 4 1.5 Ohm
2 to 3 0.9 Ohm
2 to 1 1.5 Ohm

I checked resistance between 1 and 4, 2 and 5 and 3 and 6 pins(that goes to spark plugs and they are all the same 12.37 kOhm

I'd go the a scrap now to get another one just to test but they are all closed Sunday I think.
splitskull is offline  
Old 02-09-2015, 10:51 PM
Junior Member
Thread Starter
Join Date: Jun 2011
Location: Mascouche
Posts: 2
Default Re: 2009 jku p0302

fixed it. was the coil pack
splitskull is offline  
Old 02-11-2015, 08:21 AM
Senior Member
JeepCACares's Avatar
Join Date: Jul 2012
Location: Windsor, Ontario
Posts: 152
Default Re: 2009 jku p0302

Originally Posted by splitskull View Post
fixed it. was the coil pack

Happy to hear you got everything sorted out.
Jeep should be running top notch now, especially with new plugs !
JeepCACares is offline  
Related Topics
Thread Starter
Last Post
Jeep Videos - Pictures
07-19-2012 10:36 PM
Jeep JK Forum
01-30-2012 11:35 AM
Jeep JK Forum
12-15-2011 07:45 AM
Jeep JK Forum
12-14-2011 08:32 AM
Jeep & 4x4 Items For Sale
08-27-2011 01:34 PM

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

Thread Tools
Search this Thread
Quick Reply: 2009 jku p0302

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.
Page generated in 0.07116 seconds with 12 queries