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Unread 12-14-2013, 01:25 AM   #1
ClayJohnson
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1989 YJ Wrangler 
 
Join Date: Feb 2012
Location: Ladera Ranch, California
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Idle problem HELP

So bassicly my jeep won't idle unless I rev it non stop, once I stop revving it my jeep will turn off comepletly, I thought it was the carborator like it had to be clean really well but I took it into a jeep dealership and they said I need a new motor and carb, I told my friend they said I need a new motor and he said that cant be right that I need a whole new motor and he thinks its the carb! Someone try to help me please!!! To be honest I don't know a lot about jeep motors and everything like that haha.

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Unread 12-14-2013, 07:24 AM   #2
Maverick1998
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Might be a bad battery
my 98 GC won't idle if the battery is bad
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Unread 12-14-2013, 07:32 AM   #3
WDNewman
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You don't need a new motor. You need to educate yourself to keep from being scammed.
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Unread 12-14-2013, 07:53 AM   #4
halmc
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Quote:
Originally Posted by WDNewman View Post
You don't need a new motor. You need to educate yourself to keep from being scammed.
LOL, a little blast of spelling might not hurt either.
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Unread 12-14-2013, 08:56 AM   #5
Chrisnvegas
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This is what's probably wrong.

http://www.jeeptech.com/engine/carter.html

Takes minimal tools and 15 to 20 minutes in your driveway.

When you hear mechanics talking crazy, always get a second opinion.
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Unread 12-14-2013, 01:01 PM   #6
Old4X
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Quote:
Originally Posted by Chrisnvegas View Post
This is what's probably wrong.

http://www.jeeptech.com/engine/carter.html

Takes minimal tools and 15 to 20 minutes in your driveway.

When you hear mechanics talking crazy, always get a second opinion.
Yes, a posibility, along with about 50 others.

As I mentioned in the OP's twin thread, he needs to DIAGNOSE the problem before throwing fixes at it.

If this doesn't fix it, then what? New carb? Valve job?,new CTO valve? new cat converter?, New distributor? New computer? New ICM? New SolVac? etc, etc, etc.

All the above and much more can do this
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Unread 12-14-2013, 01:30 PM   #7
jeepguy85
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Have you checked for any vacuum leaks? Also, check for leaks around the carb. I would also check your timing. I am assuming you have the stock Carter carb, which is a complete turd. Most who own a Jeep with the Carter have swapped it out for more reliable carbs.
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Unread 12-14-2013, 02:11 PM   #8
Old4X
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Quote:
Originally Posted by jeepguy85 View Post
Have you checked for any vacuum leaks? Also, check for leaks around the carb. I would also check your timing. I am assuming you have the stock Carter carb, which is a complete turd. Most who own a Jeep with the Carter have swapped it out for more reliable carbs.


He can not swap carbs in Ca. He can put a certified fuel injection system on or another OEM carb, those are his options

ETA, my Carter is fine, not a "complete turd"
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Unread 12-14-2013, 02:14 PM   #9
Chrisnvegas
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Quote:
Originally Posted by Old4X View Post
Yes, a posibility, along with about 50 others.

As I mentioned in the OP's twin thread, he needs to DIAGNOSE the problem before throwing fixes at it.

If this doesn't fix it, then what? New carb? Valve job?,new CTO valve? new cat converter?, New distributor? New computer? New ICM? New SolVac? etc, etc, etc.

All the above and much more can do this
I picked that because it' pretty common and the fix is easy and free.

I shake my head because almost every thread starts with
"It's still doing it. So far I replaced the coil, belts, hoses, plugs, wires, cap, rotor, tie rod adjustment nozzle ect."
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Unread 12-14-2013, 02:24 PM   #10
jeepguy85
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Quote:
Originally Posted by Old4X
He can not swap carbs in Ca. He can put a certified fuel injection system on or another OEM carb, those are his options ETA, my Carter is fine, not a "complete turd"
You are one of the lucky ones. I personally have never seen one run correctly. I guess CA law also means no nutter bypass?
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Unread 12-14-2013, 02:42 PM   #11
Chrisnvegas
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Carters did not leave the factory running poorly. Many of these carbs have been performing well for 20 years.

If they are not performing well after service, the rebuilder is defective, not the carb.
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Unread 12-14-2013, 02:51 PM   #12
jeepguy85
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Quote:
Originally Posted by Chrisnvegas
Carters did not leave the factory running poorly. Many of these carbs have been performing well for 20 years. If they are not performing well after service, the rebuilder is defective, not the carb.
I understand that. I agree with you. I personally have never seen one running well. Let's not turn this into a carb debate. Let's help the op solve his issue.
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Quote:
Originally Posted by Exparrot View Post
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Quote:
Originally Posted by HurricaneRZA View Post
Mean Max created Chuck Norris with some spare parts, two trac bars and some differential fluid.
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Unread 12-14-2013, 06:40 PM   #13
Old4X
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Quote:
Originally Posted by Chrisnvegas View Post
I picked that because it' pretty common and the fix is easy and free.

I shake my head because almost every thread starts with
"It's still doing it. So far I replaced the coil, belts, hoses, plugs, wires, cap, rotor, tie rod adjustment nozzle ect."
Easy and free if the owner can do it.

I had plugged idle air bleeds, but could still make it idle so it was drivable. Took two tuning sessions, but it did OK till I could find the cause. It was a poor quality idle, but wouldn't stall at a stop. The idle tube mod returned it to a sewing machine type idle, even at 300 rpms (was curious how low it would run).

For a 4.2 that has been worked on and still will not idle without stalling , more serious problems or a combo of several sound like whats going on to me.


Do not forget, when you take a Jeep to a big shop, you are paying to work on a $30,000 piece of equipment. The parts and labor are priced in line with the new ones.
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Unread 01-05-2014, 11:30 PM   #14
mcnallysport
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Here is a good resource to learn how the Carter Carburetor works, which helped me solved my idle problem.

http://u225.torque.net/cars/SL6/docs/BBD_Manuals.pdf
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Unread 01-06-2014, 12:28 PM   #15
Peety
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Here's a question, what was the fault that the dealership identified necessitating an engine replacement ? Most stores will not give an engine the kiss of death with out a very good reason. What did they say was wrong with it.

-Poor compression
-Excessive leak-down
-Improper valve operation (wiped out cam)
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