Help! Ignition coil missfires??
03-09-2013, 06:45 PM
#1
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Help! Ignition coil missfires??
So i changed the oil on my 01 XJ and before i did that, i added seafoam on the hose that goes from the engine to the master brake cilinder and once i took off the hose to add seafoam the check engine light went on. At first i thought it was from the hose but after i took it to check the light at autozone they told me it was the ignition coils multiple missfires cilinder 5 & 6...
Does it mean my coil rail is messed up and have to replace the whole rail again or could it be just the little boots?? Why did this happen after i removed the hose though?? Im confused??
Does it mean my coil rail is messed up and have to replace the whole rail again or could it be just the little boots?? Why did this happen after i removed the hose though?? Im confused??
03-09-2013, 06:52 PM
#2
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,804
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Best to post the actual code numbers here, as with OBD, the devil is in the details.
If the check engine light is not "flashing" (is it?), then I'd recommend driving it for a while, a highway jaunt, to see if it works itself out.
If the check engine light is not "flashing" (is it?), then I'd recommend driving it for a while, a highway jaunt, to see if it works itself out.
03-09-2013, 07:00 PM
#3
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Crap! Yea i forgot to ask for the code. The light stays on though. I drove it 40 miles today already and nothing...? Its driving fine though but im still concerned about it..
03-09-2013, 07:01 PM
#4
CF Veteran
Join Date: Jul 2011
Location: Pompano Beach
Posts: 1,386
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Removing the hose caused it to run lean. Probably the rear cylinders closest to the hose ran lean to the point of misfiring. It should not of damaged the coil.
03-09-2013, 10:20 PM
#7
Member
Join Date: Apr 2012
Location: Rochelle IL
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0l
Hey man having an 01 also when i did the seafoam i freaked also but it is due to the fact u pulled the hose like everyone has stated and it would cause a misfire. if running good now disconnect your battery enjoy a cold beverage and hook back up itll reset the light if it comes back on then you know you will have to dig a little deeper.
Trending Topics
03-09-2013, 10:51 PM
#8
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Yea but i had done this twice already and never gave me a problem till the third time?? So then my coils and rail and everything are fine??
03-09-2013, 10:53 PM
#9
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Hey man having an 01 also when i did the seafoam i freaked also but it is due to the fact u pulled the hose like everyone has stated and it would cause a misfire. if running good now disconnect your battery enjoy a cold beverage and hook back up itll reset the light if it comes back on then you know you will have to dig a little deeper.
03-09-2013, 10:59 PM
#10
Member
Join Date: Apr 2012
Location: Rochelle IL
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0l
nope I did it not long ago and it the light came on. the coil rail setup on ours isnt exactly like the old tried and true distributor cap ive got 138000 miles on my original one. thought about replacing it just to see what it would do then thought id rather have 100 bucks in my pocket. really though disconnect your battery to reset the light drive it if the light comes back on with the same code then we need to do some further digging.
03-09-2013, 11:32 PM
#11
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
nope I did it not long ago and it the light came on. the coil rail setup on ours isnt exactly like the old tried and true distributor cap ive got 138000 miles on my original one. thought about replacing it just to see what it would do then thought id rather have 100 bucks in my pocket. really though disconnect your battery to reset the light drive it if the light comes back on with the same code then we need to do some further digging.
03-10-2013, 12:00 AM
#12
Member
Join Date: Apr 2012
Location: Rochelle IL
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0l
ponky to tell u the truth since you said its running fine now i can garuntee you rail is fine. if your rail was badit would be missing all the time.
03-10-2013, 01:44 AM
#13
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Well if it keeps givin me problems atleast i know what it can be. Still thinking if i should seafoam it again in the future to let all the bad stuff out???
03-10-2013, 07:33 PM
#14
Member
Join Date: Apr 2012
Location: Rochelle IL
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0l
Ponky instead of seafoaming that sucker every month why dont you do a quick search on cleaning the IAC and throttle body that will do more then that seafoam. seafoam is good stuff but dont let it be a remedy to other problems. take your throttle body off search real quick on cleaning IAC and throttle body there are a million threads from all over explaining in detail how to do it very easy if you have a 10mm socket u can do this. this will benfit you most of all!
03-11-2013, 12:01 AM
#15
Junior Member
Thread Starter
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
Yea seafoam is easy to use thats why i use it. This last time i did it hardly any smoke came out so it must hae been clean. I should clean the throttle body one day though since ive never done that to it.. Ill do some google and youtube searches see what i come up with.. Thanks for all the info man i gladly appreciate it!