1989 6 cyl stalls at stop sign and when clutch is engaged while slowing down - 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 07-26-2009, 08:57 PM   #1
Newb
 
Join Date: Jul 2009
Posts: 2
1989 6 cyl stalls at stop sign and when clutch is engaged while slowing down

Hi I have just replaced cap, rotor, plugs, wires, crank case filter, fuel filter, air filter, and rebuilt the carb with new float. I checked timing, vaccume advance etc... Jeep runs descent at an idle. As soon as I go into a gear and it is a manual it stalls. I have to side step the break and gas to keep it running at every stop light. Even if I am driving down the road and I push the clutch in it will stall. Oddly enough it seems to idle just fine but it does idle high low high low Rpm not a drastic difference but not totally consistent rmp. No vaccume leaks. Can anyone help me before I throw a meatball at it! Thanks

ducatiman is offline   Quote Quick Reply
Old 07-27-2009, 07:03 AM   #2
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 4,332
Images: 1
I have an 89 with a 4.2, 5spd that had the same problem. What is your idle set at now. Your carb solenoid may not be working or not adjusted properly. This keeps the idle up, especially if you have A/C. If not it keeps the idle from going too low when you come to a stop. If your carb is otherwise ok I would check your idle (hot) and set it at no lower than 800 in neutral. Bring out your solenoid stop screw (if it's working). It really sounds like your idle settings are set too low. If this doesn't work you might just have a tired original carb. Maybe you need a professional rebuild. A lot of individuals in this forum swap out the original. Do a search for more info. I like the original carb.

kik is offline   Quote Quick Reply
Old 07-27-2009, 08:04 AM   #3
Jeeper
 
NAVYCHIEF's Avatar
 
Join Date: Sep 2008
Posts: 2,207
i had the same problem when i used oxygenated fuel. try stp fuel treatment about every 4th tank. i fixed my problem.
__________________
1994 RENEGADE

TREAT EVERY STRESSFUL SITUATION AS A DOG WOULD.
IF YOU CAN'T EAT IT OR PLAY WITH IT,
JUST PEE ON IT AND WALK AWAY.
NAVYCHIEF is offline   Quote Quick Reply
Old 07-27-2009, 09:27 PM   #4
Jeeper
 
hillclimin's Avatar
 
Join Date: Jun 2009
Location: South Central PA
Posts: 124
Send a message via AIM to hillclimin Send a message via MSN to hillclimin Send a message via Yahoo to hillclimin
I had the same problem on the same jeep; 89 YJ with 4.2 lit 5 spd... anyway I just played with the two screws on the front of the carb till it runs and idles nicely now, I set the idle at about 1000RPM and that seems to have fixed it... let us know if that works!
hillclimin is offline   Quote Quick Reply
Old 07-31-2009, 05:57 AM   #5
Newb
 
Join Date: Jul 2009
Posts: 2
Thanks for all the suggestions I will see what I can do this weekend!
ducatiman is offline   Quote Quick Reply
Old 08-01-2009, 07:40 AM   #6
Jeeper
 
buckshot500's Avatar
 
Join Date: Mar 2009
Location: Carolina
Posts: 798
Hmmm, sounds like a dreaded case of the BBD's.


Do you still have a carter carburetor?

When you rebuilt the carb, did you make certain that the idle tubes were cleared?

You might think about tossing it & getting an MC2100 from the junkyard. (1:08 venturi only)

Rebuild it, (EASY) & get an adapter (Mr.Gasket #1937) You'll be amazed at the difference!


P/M me if you want more info, & you can google MC2100 as well.
__________________
90YJ 98XJ
buckshot500 is offline   Quote Quick Reply
Old 08-01-2009, 06:05 PM   #7
Supporting Member

WF Supporting Member
 
daddyjeep's Avatar
 
Join Date: Apr 2005
Location: Smethport, PA
Posts: 2,357
I agree...get rid of that carter carb. I went with the Howell fule injection. definately a pricier option, but the best mod I have made. Whether you go with fuel injestion or another carb, I would definately recomend getting rid of the turd that you have.
__________________
87 YJ, 5.2/46RH/NP231, Custom 4 link/ Radius Arms, Ballistic Nitrogen Shocks, 35" Cooper STT DaddyJeep build Thread:http://www.wranglerforum.com/f8/dadd...ld-122601.html
daddyjeep is offline   Quote Quick Reply
Old 08-02-2009, 07:48 PM   #8
Newb
 
Join Date: Jul 2009
Location: Chesterfield, VA
Posts: 2
I just encountered the same problem this weekend. Same make and model as the original poster and same problem. After replacing every part on the ignition system, except the distributor, I went ahead and replaced it, and that is when I encountered the problem previously stated. Other than not starting periodically, the Jeep would run fine, and thats is why I replaced the distributor, I find it odd that replacing the distributor would give me this problem, and yes, I set the timing to exactly what it was before.
Greg Stapleton is offline   Quote Quick Reply
Old 08-02-2009, 09:27 PM   #9
Jeeper
 
89YJislander's Avatar
 
Join Date: Jun 2009
Location: middle Ga.
Posts: 131
i'm haven the same problem with my 89.
89YJislander is offline   Quote Quick Reply
Old 08-03-2009, 09:06 AM   #10
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 4,332
Images: 1
A lot of these problems come back to the carb. But some of the no start problems or poor running comes back to the Ignition Control Module. You probably replaced everything but that. A faulty module causes many problems with these 80's jeeps when they're going bad and most times they just fail.
kik is offline   Quote Quick Reply
Old 08-03-2009, 12:34 PM   #11
Jeeper
 
Join Date: Jul 2009
Posts: 177
Images: 27
Quote:
Originally Posted by hillclimin View Post
I had the same problem on the same jeep; 89 YJ with 4.2 lit 5 spd... anyway I just played with the two screws on the front of the carb till it runs and idles nicely now, I set the idle at about 1000RPM and that seems to have fixed it... let us know if that works!
Same here, Mine is 1989 4.2 5 speed M, did exactly what you did and it fixed it...
vijay is offline   Quote Quick Reply
Old 09-25-2009, 03:11 PM   #12
Jeeper
 
britcay's Avatar
 
Join Date: Sep 2009
Location: Grand Cayman, Cayman Islands
Posts: 26
I've a very similar problem with my '90 4.2, but involves the vaccum tube at the rear. When cold, runs fine - except I'm in the Cayman Islands, cold doesnt last long.

Periodically it'll stall at idle, or downshifting esp without the a/c on. I notice if I turn on the a/c then the idle speed increases a couple of hundred or so, not huge but sometimes then idles over 1000 so too high. There's some kind of load sense which increases power by throttling up slightly (the accelerator sinks). Perodically it'll drop down (dont think it's sticking as I've tried blipping the throttle nothing happens, then all of a sudden it drops down, only to increase a few mins later :S

So I started to check for vaccum leaks and noticed at first one tube just hanging at the rear of the carb - I traced this to the front of the air intake (before filter, manual says "reverse delay valve" what is that??).

Second and with the engine almost dying, I noticed another tube exiting the rear of the carb, going into a small diaphragm with a moving needle behind. When I removed this, the needle sat back, the engine idle jumped back to normal and the carb sucked in air thru this, but all seemed to work fine.

What (aside from unfiltered air in the carb) am I damaging by running like this? The engine has been idling perfectly (only ran upto 50mph)

I'm thinking of doing the nutter bypass as I suspect some shenannigans with the computer etc, but any ideas welcomed on that vaccum pipe?
britcay is offline   Quote Quick Reply
Old 07-16-2010, 03:56 PM   #13
Jeeper
 
britcay's Avatar
 
Join Date: Sep 2009
Location: Grand Cayman, Cayman Islands
Posts: 26
Quote:
Originally Posted by kik View Post
A lot of these problems come back to the carb. But some of the no start problems or poor running comes back to the Ignition Control Module. You probably replaced everything but that. A faulty module causes many problems with these 80's jeeps when they're going bad and most times they just fail.
Footnote:

Agree with Kik; After almost a year of various running problems (including crappy Carter carb, now replaced with MC2100) the jeep *still* had issues, until I finally replaced the ICM.

$60 part and about 10 minutes to change. To be fair, I think mine was a mix of problems, but the ICM is a cheap and easy place to start.

britcay 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



» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 01:30 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