Pentastar No.2 Cylinder Misfire - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-20-2012, 04:51 PM   #1
Jeeper
 
k17trojan's Avatar
 
Join Date: May 2011
Posts: 58
Pentastar No.2 Cylinder Misfire

Well, I had a feeling it was coming. My check engine light came on a couple of days ago and my MPGs have been slowly declining. I already had an appointment for an 8k service and mentioned those things when I dropped it off. They insisted it was a problem with the ignition system, replaced everything. The No.2 misfire persisted and they have ordered one of the improved cylinder heads for my engine. Due to the large backlog of these heads, they are going to give the Jeep back to me today and call me when the head arrives. Only question I have is whether this is going to effect the engine in the long run, driving it before the head is changed.

Hope there aren't "TOO" many others dealing with this.

Good luck and happy wheeling.

MOTIVATION!
Kevin

k17trojan is offline   Quote Quick Reply
Old 08-20-2012, 04:54 PM   #2
Member
 
Join Date: Jul 2011
Location: Someplace in Africa
Posts: 3,288
only time will tell.

pluke the 2 is offline   Quote Quick Reply
Old 08-20-2012, 05:14 PM   #3
Jeeper
 
steve66's Avatar
 
Join Date: Apr 2012
Location: sanford, florida
Posts: 381
I would have never left the lot, and demanded a rental.
__________________
-----------------
2012 Wrangler Sport (crush) sold!
2010 Carolla S
2009 Kawasaki Ninja 650
1965 Oldsmobile 442
steve66 is offline   Quote Quick Reply
Old 08-20-2012, 05:38 PM   #4
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
Welcome to the club. Whether or not it will cause any long term damage depends on what the issue with the head is and Chrysler isn't talking. So far the only things we've got to go on are that there is a valveseat issue, a lifter bore issue and a valveguide issue that all manifes themselves in the same way. The valveseat and guide issues could eventually result in a dropped valve and dead engine. The lifter bore issue shouldn't cause any future problems. Unless of course the dealer tech is a hack and does a shoddy job on the work, but that never happens at the dealer.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 08-20-2012, 05:38 PM   #5
Jeeper
 
Join Date: Feb 2012
Location: DC area
Posts: 158
I drove mine for a week with no issues but then again I never had any noticeable performance issues. Just the check engine light annoyance.
__________________
2003 Jeep TJ. Ready to hit the trails
Fishinfool is offline   Quote Quick Reply
Old 08-20-2012, 05:41 PM   #6
Jeeper
 
j0nx's Avatar
 
Join Date: Jun 2011
Location: NoVa
Posts: 848
Yes it will affect the engine and most likely outside the 100k warranty. That's the rub with the dealers telling folks to just keep driving these things after the CEL pops and the head problem is diagnosed. I'll keep driving it as long as they give me a lifetime powertrain warranty with no BS strings attached. Either that or the 30 day repair time lemon law clock starts as of that second. There are also safety issues involved with driving them in this condition as well. I know I wouldn't want my wife and daughter in a busy intersection if/when it conks out on them. Just sayin...
__________________
Natural Green 2012 JKU Sport with S Package | Freedom Top | Auto | Side Steps | Max Tow | Connectivity | Remote Start
j0nx is offline   Quote Quick Reply
Old 08-20-2012, 05:44 PM   #7
Jeeper
 
50 Something's Avatar
 
Join Date: May 2012
Location: Texas
Posts: 876
#2 Coil Pack, just a guess, but maybe the lifters. And yes it will have a big issue since the crank is getting uneven pressure while driving. I would not drive it that way.

50 Something
__________________
"In the beginning was the Word and the Word was with God, and the Word was God"

John 1:1
50 Something is offline   Quote Quick Reply
Old 08-20-2012, 05:50 PM   #8
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
The crank isn't going to care a bit. I doubt the #2 coil pack is causing the leak down test failure that results in them ordering a new head.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 08-20-2012, 05:55 PM   #9
Jeeper
 
50 Something's Avatar
 
Join Date: May 2012
Location: Texas
Posts: 876
Quote:
Originally Posted by oilwell1415 View Post
The crank isn't going to care a bit. I doubt the #2 coil pack is causing the leak down test failure that results in them ordering a new head.
Well I'm not sure about you, but if my crank was getting uneven pressure and caused it to bend or flex not according to the OEM I would have a problem...

Who mentioned leak down test?

50 Something
__________________
"In the beginning was the Word and the Word was with God, and the Word was God"

John 1:1
50 Something is offline   Quote Quick Reply
Old 08-20-2012, 07:03 PM   #10
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
Quote:
Originally Posted by 50 Something View Post
Well I'm not sure about you, but if my crank was getting uneven pressure and caused it to bend or flex not according to the OEM I would have a problem...
Do you honestly believe that a dead hole is going to put more stress on the crank than running the engine through the gears WOT? More than banging the trans back and forth between forward and reverse trying to get over or out of an obstacle? If it was so close to failure that a dead hole could push it over the edge most of them would survive the drive home from the dealer. Be realistic.

Quote:
Who mentioned leak down test?
It is a requirement of the Chrysler diagnostic procedure to determine if a new head gets installed or not. If it passes the leakdown test you don't get a new head. He is getting a new head. That means it failed the leakdown test. Pretty simple deductive reasoning here.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 08-20-2012, 07:27 PM   #11
Jeeper
 
Join Date: Jan 2012
Location: Florida
Posts: 696
pentastar

hi, i just would not drive much and call the service dept. every day to find yout when ur parts will be in...i have a 2012 and have not had that problem
your jeep has a 5 year 100k warranty you should be ok after the ur upgrade
firehawk is offline   Quote Quick Reply
Old 08-20-2012, 07:31 PM   #12
Supporting Member

WF Supporting Member
 
SilverSport's Avatar
 
Join Date: May 2011
Posts: 20,307
Send a message via Yahoo to SilverSport
Quote:
Originally Posted by j0nx View Post
Yes it will affect the engine and most likely outside the 100k warranty. That's the rub with the dealers telling folks to just keep driving these things after the CEL pops and the head problem is diagnosed. I'll keep driving it as long as they give me a lifetime powertrain warranty with no BS strings attached. Either that or the 30 day repair time lemon law clock starts as of that second. There are also safety issues involved with driving them in this condition as well. I know I wouldn't want my wife and daughter in a busy intersection if/when it conks out on them. Just sayin...
__________________
"Own a Jeep and own a piece of history."

"The Hunter is not concerned with the opinion of the Wolf."
SilverSport is offline   Quote Quick Reply
Old 08-20-2012, 10:44 PM   #13
Jeeper
 
k17trojan's Avatar
 
Join Date: May 2011
Posts: 58
Thanks for all the feedback. I'll be hounding the service department the next few weeks.
k17trojan is offline   Quote Quick Reply
Old 08-20-2012, 11:39 PM   #14
Jeeper
 
GeckoJK's Avatar
 
Join Date: Jan 2012
Location: Windsor, Ontario, Canada
Posts: 875
I would not continue to drive the Jeep if the CEL is on. Bottom line, if anything else happens to the engine you wont know till it explodes cause the CEL is already on! Demand a rental if you have this issue.
__________________
2012 Jeep Wrangler Unlimited Sport S - Gecko Pearl Coat
GeckoJK is offline   Quote Quick Reply
Old 08-21-2012, 12:35 PM   #15
Jeeper
 
Join Date: Dec 2011
Posts: 182
Personally I think the OP should feel sort of relieved at this point. At least he knows the Jeep is going to get the redesigned head. Contrast that situation with the person who has a 2012 and has been fine "so far". They don't know whether they can use the Jeep for a long vacation trip without encountering a failure a long way from home. Or wondering if your Jeep is going to crap out 4 years from now when the warranty has expired and you have to foot the repair bill out of your wallet.

I kind of wish my 2012 would go bad soon so I can get some closure on this situation.
Dale_K is offline   Quote Quick Reply
Old 08-21-2012, 01:00 PM   #16
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
I have to admit that I was a bit relieved when we got ours replaced. Now we know at least one bank of the engine should be OK as long as we have it. It had 18k miles on it when the light came on and I was just beginning to think we may have gotten lucky and wouldn't have a problem. If we had made it all the way to about 58 months or 95k miles I think I would have been getting nervous about it not happening. Of course, if that was the case it would be getting traded in at that point anyway.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 08-21-2012, 02:18 PM   #17
He's no good to me dead.

WF Supporting Member
 
spankinkopita's Avatar
 
Join Date: Apr 2011
Location: New Jersey
Posts: 934
Quote:
Originally Posted by Dale_K
Personally I think the OP should feel sort of relieved at this point. At least he knows the Jeep is going to get the redesigned head. Contrast that situation with the person who has a 2012 and has been fine "so far". They don't know whether they can use the Jeep for a long vacation trip without encountering a failure a long way from home. Or wondering if your Jeep is going to crap out 4 years from now when the warranty has expired and you have to foot the repair bill out of your wallet.

I kind of wish my 2012 would go bad soon so I can get some closure on this situation.
Same boat here. rather have it happen then wait for it. Its like evil christmas
__________________
2012 JKU Sport S Sahara Tan
- Ordered 07/07
- Enjoyed since 08/26

spankinkopita is online now   Quote Quick Reply
Old 08-21-2012, 02:23 PM   #18
Supporting Member

WF Supporting Member
 
SilverSport's Avatar
 
Join Date: May 2011
Posts: 20,307
Send a message via Yahoo to SilverSport
Quote:
Originally Posted by GeckoJK View Post
I would not continue to drive the Jeep if the CEL is on. Bottom line, if anything else happens to the engine you wont know till it explodes cause the CEL is already on! Demand a rental if you have this issue.
Engines don't explode!
__________________
"Own a Jeep and own a piece of history."

"The Hunter is not concerned with the opinion of the Wolf."
SilverSport is offline   Quote Quick Reply
Old 08-21-2012, 02:52 PM   #19
Jeeper
 
Potts's Avatar
 
Join Date: Jul 2012
Location: South Jersey
Posts: 333
I'm glad I got a 2012 and not a 2011, but this kind of blows. I wish I didn't read this thread because I was in the "Man, I hope I got a good one" camp until now. You guys make sense. Grrrr. Need to go shift some gears and forget about reading this.
Potts is offline   Quote Quick Reply
Old 08-21-2012, 04:02 PM   #20
Jeeper
 
50 Something's Avatar
 
Join Date: May 2012
Location: Texas
Posts: 876
Quote:
Originally Posted by oilwell1415 View Post
Do you honestly believe that a dead hole is going to put more stress on the crank than running the engine through the gears WOT? More than banging the trans back and forth between forward and reverse trying to get over or out of an obstacle? If it was so close to failure that a dead hole could push it over the edge most of them would survive the drive home from the dealer. Be realistic.



It is a requirement of the Chrysler diagnostic procedure to determine if a new head gets installed or not. If it passes the leakdown test you don't get a new head. He is getting a new head. That means it failed the leakdown test. Pretty simple deductive reasoning here.
Dude Chill out! I was just joking and I wasn't talking about the Crank in the Jeep. Buy a clue!

50 Something
__________________
"In the beginning was the Word and the Word was with God, and the Word was God"

John 1:1
50 Something is offline   Quote Quick Reply
Old 08-21-2012, 05:34 PM   #21
Jeeper
 
j0nx's Avatar
 
Join Date: Jun 2011
Location: NoVa
Posts: 848
Quote:
Originally Posted by SilverSport View Post


No matter how much Baghdad Bob style shilling for Chrysler corporate you do on these boards it still will not change the truth that there was a design issue and that there really is a problem with these heads. Am I worried about it? Not really, but I am concerned about safety and future reliability issues. I also don't have the patience for somebody who keeps spreading corporate propaganda.
Attached Images
 
__________________
Natural Green 2012 JKU Sport with S Package | Freedom Top | Auto | Side Steps | Max Tow | Connectivity | Remote Start
j0nx is offline   Quote Quick Reply
Old 08-21-2012, 09:13 PM   #22
Jeeper
 
Ballandchain's Avatar
 
Join Date: Dec 2011
Location: Richmond, Va
Posts: 1,047
Images: 2
Pillow fight!!!!!!
__________________
Current:2012 Dozer Sahara Past: 97 4banger x2, 2001 Sport heavily modified, 08 Rubicon. "I'm glad that I'm not like most people. That's because I think most people are stupid." -Me
Ballandchain is offline   Quote Quick Reply
Old 08-21-2012, 09:17 PM   #23
Supporting Member

WF Supporting Member
 
SilverSport's Avatar
 
Join Date: May 2011
Posts: 20,307
Send a message via Yahoo to SilverSport
Quote:
Originally Posted by j0nx View Post


No matter how much Baghdad Bob style shilling for Chrysler corporate you do on these boards it still will not change the truth that there was a design issue and that there really is a problem with these heads. Am I worried about it? Not really, but I am concerned about safety and future reliability issues. I also don't have the patience for somebody who keeps spreading corporate propaganda.
LMAO
Another example of you spewing your misguided opinions as if they were fact. If you aren't worried, how about sharing scientific facts. If you want to be a pessimist, that's your right. Keep cryin a river. I will continue to be the voice of reason.
Attached Thumbnails
Click image for larger version

Name:	j0nx.jpg
Views:	51
Size:	47.8 KB
ID:	152566  
__________________
"Own a Jeep and own a piece of history."

"The Hunter is not concerned with the opinion of the Wolf."
SilverSport is offline   Quote Quick Reply
Old 08-21-2012, 10:44 PM   #24
Jeeper
 
j0nx's Avatar
 
Join Date: Jun 2011
Location: NoVa
Posts: 848
3 out of 10 on that one. Mine was much better and more original.
__________________
Natural Green 2012 JKU Sport with S Package | Freedom Top | Auto | Side Steps | Max Tow | Connectivity | Remote Start
j0nx is offline   Quote Quick Reply
Old 08-27-2012, 12:04 AM   #25
Jeeper
 
BlackOpsJeep's Avatar
 
Join Date: Dec 2011
Location: Near Fort Stewart, GA
Posts: 615
Twice lately my engine light came on solid so i took it in and they said it was a cylinder #2 misfire and reset the engine light. Came on again, so once again, same thing. Reset and sent me on my way. Now it's back on again so this time I will demand a better solution AND rental car. I don't have time to waste bringing it in every few days. Grr. The thing is that despite the light, it drives normal, at least as far as I can tell.

Btw, a few times, my wipers just come on like they are haunted. I'm sitting at a stoplight, and they just turn on for a few seconds and shut off. My hand was on the stick so I know I didn't do it. In another event, while driving ALL OF MY DASH lights came on and chimed then went away! WTF? At least it didn't cause an accident. Finally, and the most annoying part, is that any given time my RADIO will just lose power. The funny thing is that I just make a big fist and smack the console just above it and it comes back on. LOL
__________________
“If freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter.”
― George Washington
BlackOpsJeep is offline   Quote Quick Reply
Old 08-27-2012, 07:15 AM   #26
Jeeper
 
j0nx's Avatar
 
Join Date: Jun 2011
Location: NoVa
Posts: 848
Sounds like you have an electrical gremlin and the dreaded bad head. Don't take $h1t from the dealer. You paid 40k for that heap and you demand they work out the problems within 30 days or they own it. I'd have never let them send me away the 2nd time for that CEL.
__________________
Natural Green 2012 JKU Sport with S Package | Freedom Top | Auto | Side Steps | Max Tow | Connectivity | Remote Start
j0nx is offline   Quote Quick Reply
Old 08-27-2012, 07:32 AM   #27
Jeeper
 
rtguy's Avatar
 
Join Date: Mar 2012
Location: Los Angeles, CA
Posts: 850
Quote:
Originally Posted by j0nx View Post
Yes it will affect the engine and most likely outside the 100k warranty. There are also safety issues involved with driving them in this condition as well. I know I wouldn't want my wife and daughter in a busy intersection if/when it conks out on them. Just sayin...
this is all speculation. there are no facts to back these statments. how can you say it will affect the engine outside of the warranty period? wtf? what safety issues? no one has reported a failure while driving with this condition. no stalling in intersections or "conking" out. i can see that you would be worried about it happening, but this has not happened yet. thats the reason we have yet to see a recall...theres no safety issue. you are making statements as if you are the chrystler insider that knows something the rest of us don't.

oh yeah...eventhough this cat fight between you and silversport is lame, that picture you posted labeled "silversport" made me spit out my coffee and almost shat myself. eventhough i don't agree with that type of behavior....it was funny as hell.
__________________
2012 JK Black Forest Green
rtguy is offline   Quote Quick Reply
Old 07-13-2013, 08:22 AM   #28
Jeeper
 
Join Date: Apr 2012
Location: LA
Posts: 1,192
Quote:
Originally Posted by BlackOpsJeep View Post
Twice lately my engine light came on solid so i took it in and they said it was a cylinder #2 misfire and reset the engine light. Came on again, so once again, same thing. Reset and sent me on my way. Now it's back on again so this time I will demand a better solution AND rental car. I don't have time to waste bringing it in every few days. Grr. The thing is that despite the light, it drives normal, at least as far as I can tell.

Im having the same issue. OP, what was the resolve on your issue?
__________________
2014 Anvil JKU Mutt
landi jeep is online now   Quote Quick Reply
Old 07-13-2013, 08:45 AM   #29
Jeeper
 
COStrider's Avatar
 
Join Date: Sep 2012
Posts: 1,749
Quote:
Originally Posted by rtguy View Post

this is all speculation. there are no facts to back these statments. how can you say it will affect the engine outside of the warranty period? wtf? what safety issues? no one has reported a failure while driving with this condition. no stalling in intersections or "conking" out. i can see that you would be worried about it happening, but this has not happened yet. thats the reason we have yet to see a recall...theres no safety issue. you are making statements as if you are the chrystler insider that knows something the rest of us don't.

oh yeah...eventhough this cat fight between you and silversport is lame, that picture you posted labeled "silversport" made me spit out my coffee and almost shat myself. eventhough i don't agree with that type of behavior....it was funny as hell.
Me too^
__________________
We do not take risks to escape life, but to keep life from escaping us.-Unknown
COStrider is offline   Quote Quick Reply
Old 07-13-2013, 09:43 AM   #30
Jeeper
 
Join Date: May 2013
Location: Virginia
Posts: 165
[QUOTE=SilverSport;2708408]Engines don't explode! [/QUOTE

You are wrong. If you want to say unmodified passenger car engines rarely explode I will agree with you. But engines damn sure can and have exploded. Here is the first example I could find.

Martin10 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:43 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC