spark plugs - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-05-2014, 09:10 AM   #1
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
Exclamation spark plugs

Ok so I'm still trying to fight this sputter problem and it is getting bad, so I'm looking for a write up on how to change the spark plugs on a manual 95 wrangler Sahara. having a write up on the spark plugs and replacing the distributor cap would be great!

The Silver Gorilla is offline   Quote Quick Reply
Old 02-06-2014, 12:09 AM   #2
jokerchief462

WF Supporting Member
 
jokerchief462's Avatar
 
Join Date: Apr 2012
Location: North Las Vegas
Posts: 9,295
4 or 6 cylinder no matter. Plugs are on the passenger side. Remove and keep them in order compare to the attached chart.

Don't waste any money on fancy plugs these things run best on the good old Champion plugs.

1989 Jeep Wrangler 4WD 2.5L TBI 4cyl
Part Number: 412
Alternate Part Number: RC12LYC


If you put in new ones you ay want to get some of the nice anti-seize to put on the threads of the new plugs.

Gap as required. and install. Start by hand at first before you put the plug socket on DO NOT CROSS THREAD. once installed torque.

Distributor cap is held on by screws. Remove the screws and replace with the new one then move the plug wires in the sequence from the old one. make sure you get a new rotor installed it just pops up and off the new one goes on the same way just push it down tight.

If the plug wires are old you may want new ones they come ready maid. Replace on at a time so you get the right sequence.

Spark Plug Torques
Spark Plugs:
2.5L Engine - 27 ft-lbs
4.2L Engine - 27 ft-lbs
4.0L Engine - 27 ft-lbs

Get your parts at a local store that will advise you a little. It is easy work but take your time and you will have some fun.

__________________
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 is offline   Quote Quick Reply
Old 02-06-2014, 12:15 AM   #3
jokerchief462

WF Supporting Member
 
jokerchief462's Avatar
 
Join Date: Apr 2012
Location: North Las Vegas
Posts: 9,295
Almost forgot the plug chart. Use this to read your plugs and see what kind of burn you are getting. If there is something surprising you may want to do a compression test. For that you will need a tester rent or buy and use YouTube video for guidance there are some good ones out there
Attached Thumbnails
Click image for larger version

Name:	Spark Plug Reading.jpg
Views:	110
Size:	245.1 KB
ID:	739305  
__________________
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 is offline   Quote Quick Reply
Old 02-07-2014, 11:09 AM   #4
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
thanks guys, how do i gape them? not to sure what you mean?
The Silver Gorilla is offline   Quote Quick Reply
Old 02-07-2014, 11:28 AM   #5
Jeeper
 
Fabrokoner's Avatar
 
Join Date: Apr 2013
Location: Plymouth, CT
Posts: 347
Quote:
Originally Posted by The Silver Gorilla View Post
thanks guys, how do i gape them? not to sure what you mean?


There ya go.
Fabrokoner is offline   Quote Quick Reply
Old 02-07-2014, 02:54 PM   #6
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,187
I am in South Tampa if you need some help PM me.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 02-07-2014, 03:53 PM   #7
Jeeper
 
TigWizard's Avatar
 
Join Date: Sep 2013
Location: S.W. Ohio
Posts: 441
Don't let the guy at the parts store tell you they are already gapped. I checked mine before installing and the gap was anywhere from .032-.039. I re-gapped them all to .035
__________________
91 2.5 5 spd
Stock, for now
216,000 miles
A work in progress
TigWizard is offline   Quote Quick Reply
Old 02-08-2014, 08:45 AM   #8
Jeeper
 
samizdad's Avatar
 
Join Date: Nov 2013
Location: Albuquerque, NM
Posts: 419
Great to see all the help on a basic job that some of us may assume as easy. I have found using a 3/8" fuel hose to start the plugs helps to get them in easier and not cross thread. Just get a 12" piece and put the plug in it. This way the plug doesn't fall out and you can turn the plug to start the thread. A good spark plug socket will do the trick as well. Good for you for attempting your own maintenance.
__________________
97 TJ Sport, 4.0, AX-15, 4" lift, Rancho 5000's, Pro Comp ES2000 Stabilizer, JKS discos, T-Case drop, Rampage top, Sony/Sirius deck, 33" Firestone Destination MT's
samizdad is offline   Quote Quick Reply
Old 02-09-2014, 11:50 PM   #9
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
thanks guys, yeah i like to do most of this stuff on my own, and with some help of friends. I'm going to try and tackle this in the next few days.
The Silver Gorilla is offline   Quote Quick Reply
Old 02-10-2014, 03:17 PM   #10
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
.035 is the preferred gap?
The Silver Gorilla is offline   Quote Quick Reply
Old 02-10-2014, 04:50 PM   #11
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 3,265
Stock champion plug is gapped at .035. Yep. Do them 1 at a time. take pictures of the wires and how they run. Something to refer to incase you get messed up, or stop for a break and forget where you left off.

To most of us, changing plugs can be done in our sleep. It's just a part of normal maintenance. If you've never done it before it can seem scary. But, once you get the hang of it, you will be turning wrench just like the pros do.
__________________
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote Quick Reply
Old 02-10-2014, 05:05 PM   #12
Jeeper
 
rstoltenberg1's Avatar
 
Join Date: Jan 2014
Location: Oil City,PA
Posts: 31
Quote:
Originally Posted by 0III0forlife View Post
Stock champion plug is gapped at .035. Yep. Do them 1 at a time. take pictures of the wires and how they run. Something to refer to incase you get messed up, or stop for a break and forget where you left off.

To most of us, changing plugs can be done in our sleep. It's just a part of normal maintenance. If you've never done it before it can seem scary. But, once you get the hang of it, you will be turning wrench just like the pros do.
x2, But double check the gap, sometimes box's fall or whatever and can screw the gap up. Seen it a couple time's.
rstoltenberg1 is offline   Quote Quick Reply
Old 02-10-2014, 05:09 PM   #13
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
I got Bosch plugs cuz advanced did have champion. These plugs are gapped at .040 I just double checked them as well and they are all on point. Should I bring them down to .035?
The Silver Gorilla is offline   Quote Quick Reply
Old 02-10-2014, 06:03 PM   #14
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,187
Quote:
Originally Posted by The Silver Gorilla View Post
I got Bosch plugs cuz advanced did have champion. These plugs are gapped at .040 I just double checked them as well and they are all on point. Should I bring them down to .035?
Gap them to .035 I have had real bad luck with Bosch plugs. I have actually had to pull a new set of them out of cars because of problems with missing and drive ability. If I cant get Champion I get Autolite standard or single platnum plugs #985 or AP985. Offer is still open if you need any help just pm me.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 02-10-2014, 06:50 PM   #15
Jeeper
 
rstoltenberg1's Avatar
 
Join Date: Jan 2014
Location: Oil City,PA
Posts: 31
Quote:
Originally Posted by Mowrangler View Post
Gap them to .035 I have had real bad luck with Bosch plugs. I have actually had to pull a new set of them out of cars because of problems with missing and drive ability. If I cant get Champion I get Autolite standard or single platnum plugs #985 or AP985. Offer is still open if you need any help just pm me.
Where at in tampa? Largo here.
rstoltenberg1 is offline   Quote Quick Reply
Old 02-10-2014, 09:35 PM   #16
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
so, i just replaces all the spark plugs and the wires. and I'm still having the same problem. I have a new head pipe shipping to my house, i i will be putting the o2 sensor back in. I'm starting to think its the fuel injectors. Anyone have a write up on how to do them?
The Silver Gorilla is offline   Quote Quick Reply
Old 02-10-2014, 09:40 PM   #17
jokerchief462

WF Supporting Member
 
jokerchief462's Avatar
 
Join Date: Apr 2012
Location: North Las Vegas
Posts: 9,295
Without the O2 sensor installed the ECU will be getting bad data and the mixture will be off and maybe timing.

Fix the head pipe and I2 sensor.

You throwing any codes. That is really the best place to start.

If you don't know how to pull the codes there is a YouTube video that explains it. Done by cycling the key on and off.
__________________
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 is offline   Quote Quick Reply
Old 02-10-2014, 09:48 PM   #18
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
yeah iv head that how you pull em, but i figured i would see if i could use this computer on it or not, kinda take the guess work outta it. Also if i do have to change the injectors, i think I'm going to replace the fuel rail as well, its quite rusty, and I'm scared that it may break in the process of changing the injectors
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 04:54 AM   #19
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,187
Quote:
Originally Posted by rstoltenberg1 View Post
Where at in tampa? Largo here.
South Tampa near the Air Force base.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 02-11-2014, 02:00 PM   #20
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
ok so i pulled the codes. i think i got them but does someone wana look over this video and post what these codes want me to do?!

and the link is being weird for me so if you have to type in youtube.com / watch?v=LYoASK96yEc
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 04:44 PM   #21
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,187
I was never much good at reading flashing lights. I have been fortunate thru my career to have access to scanners where I didnt have to rely on flashing lights. My scaner only tells me what the flases are but the codes and will give me real time data that tells me not only what part to suspect but tells me what the system is actually doing.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 02-11-2014, 04:46 PM   #22
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
Ok I have a scanner as well but was wondering if they plug into the jeep.
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 04:57 PM   #23
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 3,265
All of the codes that yours is flashing relate to the faulty readings of the oxygen sensor.
__________________
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote Quick Reply
Old 02-11-2014, 05:00 PM   #24
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
Well let's hope this stops once that head pipe is in.
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 05:04 PM   #25
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
OlllOforlife can you tell me what codes you think came up??
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 05:25 PM   #26
Jeeper
 
Mowrangler's Avatar
 
Join Date: Jun 2013
Location: Tampa Fl.
Posts: 1,187
Remember that when you install the new pipe and O2 sensor to disconnect the battery for a minute or so to allow the computer to reset.
__________________
95 YJ 2.5 5 speed 33" Mud Rovers SOA
A frustrating WORK IN PROGRESS
Mowrangler is offline   Quote Quick Reply
Old 02-11-2014, 06:15 PM   #27
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 3,265
The first one is a 1-2...battery disconnect within the last 50 key cycles.

Then a 2-1...Upstream O2 sensor faulty reading. (there isn't one)

Then a 5-1...Lean fuel mixture detected. (PC tried to adjust fuel)

Then a 2-1...Upstream O2 sensor faulty reading (there isn't one)

Then a 5-2...Rich fuel mixture detected. (PC tried to adjust fuel the other direction)

Then a 5-5...Completion of fault codes.
__________________
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote Quick Reply
Old 02-11-2014, 06:20 PM   #28
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 3,265
You can google Jeep OBD1 codes and get the whole list for future reference.

You will always get the 1-2 at the beginning if you disconnect the battery in 50 key cycles.

Most get a 33 next which means AC compressor, but you must have AC, cause that code didn't come up.

1 flash then a space then 2 flashes...then a long space between the codes till you get a 5-5 at the end. If you do the test and just get a 5-5 then the PC thinks there is nothing wrong.
__________________
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote Quick Reply
Old 02-11-2014, 06:39 PM   #29
Jeeper
 
The Silver Gorilla's Avatar
 
Join Date: Jan 2013
Location: Tampa
Posts: 620
Quote:
Originally Posted by 0III0forlife View Post
The first one is a 1-2...battery disconnect within the last 50 key cycles. Then a 2-1...Upstream O2 sensor faulty reading. (there isn't one) Then a 5-1...Lean fuel mixture detected. (PC tried to adjust fuel) Then a 2-1...Upstream O2 sensor faulty reading (there isn't one) Then a 5-2...Rich fuel mixture detected. (PC tried to adjust fuel the other direction) Then a 5-5...Completion of fault codes.
i counted the same numbers when I did it the first time as well. It's a plus that it's not the injectors.
The Silver Gorilla is offline   Quote Quick Reply
Old 02-11-2014, 07:49 PM   #30
jokerchief462

WF Supporting Member
 
jokerchief462's Avatar
 
Join Date: Apr 2012
Location: North Las Vegas
Posts: 9,295
It's all O2 sensor should be an easy fix

__________________
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 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



» Vendor Spotlight (Deals & More)
Jeep Parts - Jeep Wheels - Jeep Soft Tops
» Recent Threads

» Popular Tags
2.5 2014 advice audio bestop build bumper camping clutch death wobble doors electrical engine exhaust fenders for sale frame gears hardtop hard top help advice jeep jeep tj jeep wrangler jeep yj jku leak led lift lift advice lift kit lights manual mods mud newbie noise oem outdoorx4 parts quadratec radiator rims rubicon rust sahara shocks soft top speakers sport springs steering stereo stock subwoofer suspension suspension lift swap tire tires top transfer case transmission unlimited wheels wheels and tires winch wiring wrangler wrangler tj
» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:10 AM.



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