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Old 08-10-2009, 04:08 PM   #1
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Unhappy Is this worth the money?

I'm having fits with keeping my yj idling. Cuts off when i push in the clutch and everybody thinks I want to drag race when i'm sitting at a redlight. None of the vacuum lines are hooked up and I can't find a diagram that works.
So 3 questions:
Do I want to replace with the weber?
If I do can I forget about the vacuum lines?
What about the Holly street avenger?(discription sounds like it will do same thing and almost $100.00 cheaper)

Or...anybody have a link to vacuum lines and I can try that first.

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Old 08-10-2009, 06:41 PM   #2
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Please see sticky on vacuum leaks above. Some good ideas in the replies.

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Old 08-10-2009, 07:14 PM   #3
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Go with the weber conversion kit... 32/36 DGEV
That should fix the problem
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Old 08-10-2009, 07:17 PM   #4
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throttle body fuel injection, a little more money, but you'll never be sorry.

a little more than that 4.0 head conversion, uses 4.0 multi port injection.
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Old 01-18-2012, 03:01 PM   #5
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Okay, I'm having similar problems that evidently others are having with their carb'd 4.2Ls. I'm seriously thinking about buying a multi-port injection conversion kit and being done with it once and for all. My questions are:
1. Is the 'weber' conversion kit an easier and less expensive option for the same result?
2. Are there other options that I should consider?
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Old 01-18-2012, 04:25 PM   #6
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Had the same problem with my '90.Sure sounds like a vacuum leak or clogged idle tubes. A nutter bypass and MC2100 conversion took care of my problems and most of my vacuum line were eliminated. I have no experience with the weber, went with MC2100 due to cost and I could rebuild myself.

Diagram near bottom of page.

Jeep Y J Require vacume hose diagram for a 1989 Jeep YJ, 6cly - JustAnswer
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Old 01-19-2012, 05:41 AM   #7
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Definitely sounds like a vacuum leak. I have one that's starting and it's driving me crazy too. Jeep just stalls out at random now. Seems to do it worse when it's cold but even after I'm driving it a bit it will stall at idle.
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Old 01-19-2012, 07:41 AM   #8
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Quote:
Originally Posted by 89YJislander View Post
I'm having fits with keeping my yj idling. None of the vacuum lines are hooked up
That why it won't idle....major vacuum leaks...plug them baby's up!
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Old 01-19-2012, 12:36 PM   #9
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Plug the vacuum lines up or hook them up properly. Vacuum leaks on these engines can cause all kinds of crazy revs.
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Old 01-19-2012, 04:51 PM   #10
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Quote:
Originally Posted by cnnblckbrn View Post
Okay, I'm having similar problems that evidently others are having with their carb'd 4.2Ls. I'm seriously thinking about buying a multi-port injection conversion kit and being done with it once and for all. My questions are:
1. Is the 'weber' conversion kit an easier and less expensive option for the same result?
2. Are there other options that I should consider?
The "weber" conversion is garbage! I just pulled mine off for a Motorcraft 2150 and the difference is night and day!

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