Cylinder 3 misfire.
11-26-2016, 06:43 AM
#1
Newbie
Thread Starter
Join Date: Sep 2016
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Cylinder 3 misfire.
The codes read p0303 for misfire in cylinder 3. I changed the spark plugs and, boots. Cleared the codes. A week later check engine light came back on saying the same code. Any guidance on how to fix this problem would be greatly appreciated.
Thanks.
Thanks.
11-26-2016, 06:58 AM
#2
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
What year is it?
11-26-2016, 07:17 AM
#4
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
It could be a dirty injector.
Get some BG 44K and follow the directions on the can. It isn't cheap but nothing works like it does either.
Get some BG 44K and follow the directions on the can. It isn't cheap but nothing works like it does either.
11-26-2016, 07:21 AM
#5
Newbie
Thread Starter
Join Date: Sep 2016
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
11-26-2016, 07:30 AM
#6
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Seafoam sucks and it didn't go through the injectors......
11-26-2016, 07:35 AM
#7
Newbie
Thread Starter
Join Date: Sep 2016
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Trending Topics
11-26-2016, 07:40 AM
#8
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
11-26-2016, 07:46 AM
#9
Newbie
Thread Starter
Join Date: Sep 2016
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Yes that, is mainly when the sputtering/rough idle happen. After a few minutes of giving it some gas it goes away.
11-26-2016, 08:42 AM
#10
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
11-27-2016, 03:40 AM
#11
Newbie
Join Date: Nov 2016
Location: Central new youk
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0 v6
So there's a factory issue you have to insulate the hell out of cylinder 3 you have to get a special heat sheild from jeep and insulate the hell out of it. Man I wish I had a link for ya. I just know because t happened to me.
11-27-2016, 04:04 AM
#12
Moderator CF K9-unit
Join Date: Apr 2012
Location: Alaska
Posts: 5,842
Likes: 0
Received 9 Likes
on
8 Posts
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
I found wrapping the injectors with heat resistant tape works well also.
Read post 8. in this link
VVVVVVV
https://www.cherokeeforum.com/f2/hea...6/#post3328474
Last edited by Dumajones; 11-27-2016 at 01:04 PM.
11-27-2016, 07:48 AM
#13
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Read post 8.. it has the part numbers for the fix that helps sometimes.
I found wrapping the injectors with heat resistant tape works well also.
Read post 8.
https://www.cherokeeforum.com/f2/hea...6/#post3328474
I found wrapping the injectors with heat resistant tape works well also.
Read post 8.
https://www.cherokeeforum.com/f2/hea...6/#post3328474
11-27-2016, 01:02 PM
#15
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0