rough start and idle - 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 04-22-2010, 04:38 PM   #1
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
rough start and idle

so i recently purchased an 87 wrangler with the I6. Figured it would be good because its carbureted and something more mechanical i could work on. As of late though i've been having some rough starts and it idles high when i first get it started and then finally settle down a bit. does anyone know what this could be???? thanks

__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-23-2010, 08:17 AM   #2
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
i noticed today on a rough start that the fumes spell real gassy, could this be a timing problem or something like that? anybody?

__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-23-2010, 08:45 AM   #3
Jeeper
 
Thuone's Avatar
 
Join Date: Apr 2010
Location: Ocala, FL
Posts: 160
The high idle is an automatic choke it's perfectly normal. Let it run a few minutes at the high idle then tap the gas it will go down. I would definitely give her a tune up see where that gets ya. Try a new air filter if dirty, plugs, wires, seafoam treatment and have someone check your timing.
__________________
Just
Empty
Every
Pocket
Thuone is offline   Quote Quick Reply
Old 04-23-2010, 09:24 AM   #4
President, ThumbJeeps

WF Supporting Member
 
sevenservices's Avatar
 
Join Date: Sep 2009
Location: Mid-Michigan/Thumb
Posts: 3,947
x2, +if you smell a lot of gas, chances are it is not all getting burned. New spark plugs (make sure they are gapped right) new cap and rotor to start. Should be a cheap fix on the plugs/cap/rotor. Then, if it still has the issue change your wires and have your timing checked (after installing new wires/cap/rotor & plugs). If they mess with the timing without changing all that stuff first, you'll be waisting time by adjusting it to compinsate for other problems.

On a side note, I did see the same symptoms once when a catalitic convertor was clogged up. But, it would sound very restricted when trying to pass another car, amost like blowing air through a small straw...

I should say to, if you've never changed a cap and rotor, the easiest way to do it without fudging up your wires is to pull the old cap with the wires still on it, set it over to the side, swap the rotor out, put the new cap on then move each wire one at a time onto the matching spot of the new cap.
__________________
-Chris
President, ThumbJeeps
CB Callsign "AirForce One"


1994 Wrangler YJ I6 4.0 H/O Auto 3 spd. 4" RC (33x12.5) (15x8) 3:54 Gears
sevenservices is offline   Quote Quick Reply
Old 04-23-2010, 05:40 PM   #5
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
well i do need to replace the front pipe and catalytic converter i know that much... heat shield fell off the converter and there is a leak in the front pipe that makes it sound real loud. i wanna do the plugs, cap, wires and such as soon as i get home from college and start working again... gotta remember most of my money is going towards beer these days
__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-23-2010, 07:29 PM   #6
Supporting Member

WF Supporting Member
 
scott howard's Avatar
 
Join Date: Dec 2009
Location: wichita falls texas
Posts: 1,035
if you have not done the nutter bypass to your jeep yet that will be the first thing to do.
it will make it start easy run smoother and stronger and rev out faster .
a major improvement all around.
here is a link on how to do it.
and it is a free fix.
This is a Picture Guide to Nutter Bypass - JeepForum.com
__________________
Scott Howard
940-444-1972
scott howard is offline   Quote Quick Reply
Old 04-25-2010, 03:45 PM   #7
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
sounds real easy just have never done any timing stuff
if i did all the wiring could i then take it to a shop and have them do the timing
or wouldn't they do that?
__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-25-2010, 10:26 PM   #8
Supporting Member

WF Supporting Member
 
scott howard's Avatar
 
Join Date: Dec 2009
Location: wichita falls texas
Posts: 1,035
no you need to do the timing right then .
just get a timing light ( AUTO PARTS STORE WILL LEND YOU ONE ) and do the wiring and then call me and i will walk ya thru setting the timing over the phone.
i will be glad to help ya out.
that is what being part of the jeep family is about.
__________________
Scott Howard
940-444-1972
scott howard is offline   Quote Quick Reply
Old 04-26-2010, 08:08 AM   #9
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
thanks man i will be sure to take you up on that
give me like a week or so maybe
i wanna get home before i end up doing it
__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-26-2010, 08:28 PM   #10
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
do i essentially need a timing light?
i noticed on the one right up that there are notches
and i should move mine to the 6th one up (8 degrees)
does this mean i still need the timing light?
__________________
Once a Jeep lover, always a Jeep lover

hotshotjus is offline   Quote Quick Reply
Old 04-26-2010, 08:56 PM   #11
President, ThumbJeeps

WF Supporting Member
 
sevenservices's Avatar
 
Join Date: Sep 2009
Location: Mid-Michigan/Thumb
Posts: 3,947
not sure about messin' w/timing but if you want to do it, yeah use a light to be sure your dead on where you want to be.

But, start with the consumables. Spark plugs are made to fail, same with cap & rotor... Not once have I ever replaced a cap, rotor, plugs and wires without a noticable difference in smoothness and performance. When those parts are new and you have a good clean fuel system you should be able to just about balance a dime on the engine.
__________________
-Chris
President, ThumbJeeps
CB Callsign "AirForce One"


1994 Wrangler YJ I6 4.0 H/O Auto 3 spd. 4" RC (33x12.5) (15x8) 3:54 Gears
sevenservices is offline   Quote Quick Reply
Old 04-26-2010, 08:59 PM   #12
President, ThumbJeeps

WF Supporting Member
 
sevenservices's Avatar
 
Join Date: Sep 2009
Location: Mid-Michigan/Thumb
Posts: 3,947
oh, and to save cost, start with spark plugs man. You should be able to get 'em between $8-$16.00

...With a socket to fit and a new ratchet for $30.00
__________________
-Chris
President, ThumbJeeps
CB Callsign "AirForce One"


1994 Wrangler YJ I6 4.0 H/O Auto 3 spd. 4" RC (33x12.5) (15x8) 3:54 Gears
sevenservices is offline   Quote Quick Reply
Old 04-27-2010, 05:26 PM   #13
Jeeper
 
hotshotjus's Avatar
 
Join Date: Apr 2009
Location: Downingtown, PA
Posts: 192
yea i wanna do a tune up anyways
also want to clean the carb out
from what i've read the carbs get pretty clogged

__________________
Once a Jeep lover, always a Jeep lover

hotshotjus 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough idle for about 2-3mins after start up. motokeen TJ General Discussion Forum 17 10-16-2011 10:26 AM
Erratic idle after start up for a minute when hot or cold? autopc25 TJ Tech Forum 2 01-09-2010 06:25 PM
4.0 Hard Start / Backfire / Rough Run after extended idle biasdesign YJ Tech Forum 1 12-29-2009 06:49 PM
Rough Idle and Starting Issue crashnburn54 TJ Tech Forum 6 10-30-2009 09:11 AM
Rough start, won't idle woods453 TJ Tech Forum 2 07-22-2009 11:52 PM



» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 12:49 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