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Old 12-13-2013, 01:04 AM   #1
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Carburetor troubles...

So I bought my YJ knowing it had some work to be done to it, for the last week every time I go to pump the accelerator pedal to start the engine I am having a horrible time with it, it makes a horrid screech sometimes, and today when pumping the pedal the throttle cable disconnected from the carburetor. Any advice to what's wrong? Also having a hard time identifying all the parts under the hood, I'm really just trying to learn as much as I can about this jeep. Any advice will help.
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Old 12-13-2013, 01:15 AM   #2
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The loud screech sounds more like a belt issue.

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Old 12-13-2013, 12:00 PM   #3
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On mine...


The PCV valve is connected to a fitting on the air filter housing, not to the bowl vent on the carburetor.

Also the bowl vent is connected to the charcoal filter, located underneath the coolant and the washer fluid tanks.

I am in no way a Weber carb encyclopedia, but I have been chasing an un-metered air leak on mine for a while and I discovered the EGR blocking plate has a leak, after I put the EGR valve back in place with a fresh gasket the leak was solved.

The screeching sound is very descriptive of a loose belt.
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Old 12-13-2013, 12:17 PM   #4
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sounds like you need to check and repair or replace the linkage/cable on your accelerator
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Old 12-13-2013, 12:33 PM   #5
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So replace the throttle cable? I know they come in two sizes, besides taking the cable off and measuring it is there a less painful way of seeing which size I have?

Also, besides the cost, are there any negative effects to converting from carbureted to EFI?
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Old 12-13-2013, 02:12 PM   #6
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I converted mine about a month ago haven't had anything to say but what a difference do not have to pump gas pedal anymore. Just turn the key and it starts and idles every time.Response is awesome have had power increase don't know how much though.Luv this fuel injection
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Old 12-14-2013, 11:53 PM   #7
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Decoy, did you install it yourself or take it to a shop?
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Old 12-15-2013, 12:00 AM   #8
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Looks like yours also has the 4.0l cylinder head swap, that being the case, you can find a 4.0l and take all the fuel injection stuff including the computer and sensors and do a simple install. I found a complete 4.0l engine on craigslist with a cracked block for $80 including all the efi stuff. start looking!
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Old 12-15-2013, 01:07 AM   #9
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I was under the impression my YJ was a 4.2L
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Old 12-15-2013, 01:25 AM   #10
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Quote:
Originally Posted by zcampbell90 View Post
I was under the impression my YJ was a 4.2L
It is, it just has a 4.0l cylinder head installed so consider yourself lucky. Just means you've got more ponies than a 4.2l only engine has
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Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
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Old 12-15-2013, 01:28 AM   #11
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Sorry for sounding like a complete noob, but how can you tell? Also for the complete EFI Kit I was looking at on jeep 4x4, would I still get the 4.2l one or would I get the one that says just 6 cyl?
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Old 12-15-2013, 05:52 AM   #12
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What they are saying is you have a 4.0 head on your 4.2. The 4.0's are all fuel injected. You can go to a junkyard and get the EFI parts from a 4.0 rather than buying a kit which will cast a lot more.
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Old 12-15-2013, 09:21 AM   #13
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If the screeching you are talking about only happens intermittently it could possibly be the starter or flywheel (flexplate if you have a/t). Does it continue to screech after you let go of the key?
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Old 12-15-2013, 11:03 AM   #14
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Quote:
Originally Posted by Fabrokoner View Post
What they are saying is you have a 4.0 head on your 4.2. The 4.0's are all fuel injected. You can go to a junkyard and get the EFI parts from a 4.0 rather than buying a kit which will cast a lot more.
Bingo! Should cost no more than $400 at a junkyard for a better efi system instead of an efi kit that will run $1300. Just go to a junkyard and pull all the sensors attached to the computer with computer and the full fuel rail and throttle body assembly from a 4.0l. I'd try to get the mopar efi parts and not the Renault efi parts though so anything after 91
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Old 12-15-2013, 11:53 AM   #15
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No it just screeches as soon as I start it
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Old 12-15-2013, 12:27 PM   #16
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Quote:
Originally Posted by c5wagner View Post
Bingo! Should cost no more than $400 at a junkyard for a better efi system instead of an efi kit that will run $1300. Just go to a junkyard and pull all the sensors attached to the computer with computer and the full fuel rail and throttle body assembly from a 4.0l. I'd try to get the mopar efi parts and not the Renault efi parts though so anything after 91
Awesome, I'll definitely try to find A junk yard out here and get the parts. Thanks for the advice!

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