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Group: Forum Members
Last Login: 4/18/2010 11:22:05 PM
Posts: 300,
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Got a question for 4.2 engine lovers. I have been having problems lately with my jeep stalling while going up through the gears from a stop. It just starts to cut out like someone is turning off ignition and sputters. I can get it to re-fire after pulling over and cranking and pumping the gas pedal several times. I never had any problems like this before just the last couple times out wheeling. It has all new spark plugs and wires and new distributor. I am thinking it might be fuel pump or maybe the accelerator pump in carb. Any help will be greatly appreciated.
Thanks
Ken
Jeep- Just Empty Every Pocket!!!
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Post #588271
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Group: Forum Members
Last Login: 5/7/2010 4:18:04 AM
Posts: 5,202,
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Dear Riviera;
What sort of fuel delivery system do you have? Is it the factory Carter carb or an aftermarket setup?
Your friend;
LAMAR
" The slightly increased level of roughness encountered by the driver and passengers of a leafsprung offroad vehicle should be viewed as a constant, gentle reminder that they are lucky enough to be riding on the most perfectly designed suspension system in the world"
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Post #588272
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Group: Forum Members
Last Login: 7/7/2010 4:24:13 AM
Posts: 3,479,
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I had a similar problem on my 88 YJ 4.2. Rebuilt that stupid Carter carb 3 times and eventually had to replace the engine computer. That's right, it was carbed and had a computer. The computer helps control the carb.
Bill Hooven
Jeeps Only
http://www.jeepsonly.com
http://www.tnvjc.org (Tennessee Virtual Jeep Club)
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Post #588273
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Group: Forum Members
Last Login: 5/28/2010 3:05:05 AM
Posts: 663,
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Similar problem recently with mine, but it only happened under acceleration at 2000 rpm and up. Plugged filter in my case. Wasn't getting enough gas at the higher flows. Cheap thing to eliminate from the equasion before you get too deep.
- Bill
Human Beings were invented by Jeep as a device for transporting itself from one place to another.
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Post #588274
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Group: Forum Members
Last Login: 4/18/2010 11:22:05 PM
Posts: 300,
Visits: 1,660
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Hey guys thanks for the help. I did look at the carb and it's a Weber with a lot of vaccum lines LOL. I am going to go ahead and change the fuel filter (which is fairly new) and also the fuel pump and new spark plugs which are same age as fuel filter. I will keep veryone posted as to what fixes it.
Jeep- Just Empty Every Pocket!!!
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Post #588275
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Group: Forum Members
Last Login: 6/21/2007 2:26:19 AM
Posts: 367,
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on my 89YJ I had the same symptoms when my power steering fluid disappeared (slow leak). so in my case, if you don't add step on the gas a bit, it don't wouldn't idle not enoigh power to turn that power steering pump w/o fluid. Same happened while i was switching gears or stepping on the brakes.
So verify all systems that your motor is turning and make sure all is turning without resistance.
But having said all above, odd are that your problem is in the carb or vacuum leak.
Aleks
1989 Wrangler YJ Sahara
2005 Subaru Forester XS
...Life's journey is not to arrive at the grave safely in a well preserved body but rather to skid in sideways, totally worn out, shouting "Holy shit...what a ride!"
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Post #588276
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Group: Forum Members
Last Login: 5/7/2010 4:18:04 AM
Posts: 5,202,
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Dear Riviera;
OK, I am still going to need more info. Your carb could very well be a Carter BBD that was in fact built by Weber USA. It sounds to me like the acceleration/mid-range circuit inside of the carb is dirty based on your symptons. If you could post a pic of the carb in question, it would greatly assist me in determining what the proper course of action would be.
Your friend;
LAMAR
" The slightly increased level of roughness encountered by the driver and passengers of a leafsprung offroad vehicle should be viewed as a constant, gentle reminder that they are lucky enough to be riding on the most perfectly designed suspension system in the world"
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Post #588277
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Group: Forum Members
Last Login: 4/18/2010 11:22:05 PM
Posts: 300,
Visits: 1,660
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quote:
Originally posted by Lamar
Dear Riviera;
OK, I am still going to need more info. Your carb could very well be a Carter BBD that was in fact built by Weber USA. It sounds to me like the acceleration/mid-range circuit inside of the carb is dirty based on your symptons. If you could post a pic of the carb in question, it would greatly assist me in determining what the proper course of action would be.
Your friend;
LAMAR
Ok here's the update; I changed the fuel pump, fuel filter(opened old one and was still brand new condition inside), changed the spark plugs(they looked good but changed anyways, they seemed like it maybe a little lean condition), checked all fuel lines and all vacuum lines. Test drove it and seemed to work fine. Towed it behind motor home to a friend’s house and drove it home (approx. 15 miles on freeway). Everything seemed to be working good until almost home I notice right when I change gears as RPM are climbing right before next gear change it seem like it would flutter a little. So after next stoplight I took the RPM's up even higher then normal and before shifting I got it to do it. It seems like it's losing spark for just a quick second.
I had a Chevy 454 do almost the same thing and chased the problem for awhile until some one told me to change the spark plug wires that they were probably grounding out, so I did and it cured the problem, but mine are only like 8 months old with hardly any driving on them.
LAMAR I will try and post up a picture, I might have to email it to you I am not sure how to re-size it and post on here, I know call me stupid~~! LOL
Thanks for the posts!
Ken
Jeep- Just Empty Every Pocket!!!
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Post #588278
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Group: Forum Members
Last Login: 4/28/2010 4:40:22 PM
Posts: 3,810,
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Coil.
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Post #588279
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Group: Forum Members
Last Login: 4/18/2010 11:22:05 PM
Posts: 300,
Visits: 1,660
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quote:
Originally posted by Leo
Coil.
Thanks I was thinking of changing that next!
Jeep- Just Empty Every Pocket!!!
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Post #588280
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