Carb Help - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old August 25th, 2008, 06:53 PM   #1
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default Carb Help

Well I have an 90 YJ with 4.2 258c.i. and a Holley 4bbl on it, it is a 390cfm. I took it off (which began my whole problem...but at least I sort of understand what each part does now) because I was told it was mounted 90* the wrong way.

Once I got it off I seen why it was mounted like that, because the intake I have (offenhauser) only allows it to be mounted like that, (fuel bowls east and west, and the linkage facing the north). Well I went to put the carb back on, with new gaskets for the carb to intake spots and started it up and it was leaking gas at the secondary bowl where the feed tube meets it.

I took it off and found the oring was busted so I got some from the hardware and they held. I put the carb back on and now it wont idle down under 1500 rpms. The idle screw has no effect on the idle, higher or lower. You can still rev it up and everything, it drives alright, but I cannot adjust the idle. After you get done driving it and shut it off, it will shut down and then start back up for 5 seconds, but sounds like a diesel. Yesterday I noticed the gasket that is between the spacer and the carb was saturated with gas, and the bottom of the carb had gas dripping from it directly into the carb, I know that it is where gas is coming out, but shouldn't it be a vapor? not a liquid.

So what should I look for? Other mods to this engine include Davis Unified Distributor, holley 4bbl, K&N filter, Offenhauser intake, Flexalite fan, It is a newly reman 258, and I just changed the plugs, they are stock heat champions. I believe the plug wires are the livewires from davis also.... Two other things, when the carb was off I emptied 3 cans of carb cleaner on it and in it, let it dry for a day, and I didn't read like I should have and didn't pull the coil plug when filling the bowls with gas after putting the carb back on.
jeepxj2007 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old August 25th, 2008, 07:04 PM   #2
Cooter
Dad Kickin' It OldSkool
 
Cooter's Avatar
 
Join Date: 12-04-05
Location: Chi-caw-go
Posts: 4,504
iTrader: (16)
Mentioned: 1 Post(s)
Default

First, make sure you haven't bound the linkage or throttle plates in any way.
__________________
Michigan- The Only Great Lakes State South of the Mason-Dixon Line.
Cooter is offline   Reply With Quote
Old August 25th, 2008, 07:30 PM   #3
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default

they seem to move very freely, although when it was idling like that, I could push super hard on the throttle arm (opposite direction of movement than pressing in the gas peddle and it would lower the rpms significantly, but when I released it went back to where it was, there wasn't any actual movement of the arm, but just the pressure going down would do it.
jeepxj2007 is offline   Reply With Quote
Old August 25th, 2008, 07:31 PM   #4
dodger889
Senior Member
 
dodger889's Avatar
 
Join Date: 03-12-08
Location: north of ann arbor, mi
Posts: 1,109
iTrader: (8)
Mentioned: 1 Post(s)
Default

Did you reinstall the float needle valves and adjusted them?? and like cooter said check you linkage for binding or sticking.
dodger889 is offline   Reply With Quote
Old August 25th, 2008, 08:31 PM   #5
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default

I didn't mess with the floats at all...do they need to be readjusted after taking the bowls off?
jeepxj2007 is offline   Reply With Quote
Old August 25th, 2008, 10:29 PM   #6
dodger889
Senior Member
 
dodger889's Avatar
 
Join Date: 03-12-08
Location: north of ann arbor, mi
Posts: 1,109
iTrader: (8)
Mentioned: 1 Post(s)
Default

Ok maybe a better question then where you having problems before you took the carb off. Then in removing the carb you could have gotten some dirt or junk in the fuel line that is hung up in the needle valves. The other question would be how far did you take things apart?? Separated the body?? valve bodies removed?? If so did you get the little ball bearings and springs back in place?? New gaskets?? Holley carbs are sometime a pain to work with ( my own personal oppion) others say they are easy. And if you can get the model number off of the carb and search the web for a diagram for the linkage. The other thing you might want to look at is the choke kick up lever in the right place not hanging up under a second idle speed screw or set block.
dodger889 is offline   Reply With Quote
Old August 26th, 2008, 05:10 AM   #7
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default

about the only thing I did was pull the bowls off and the feed tube, I really didn't tinker with anything inside too much, last night I pulled the powervalve off, I believe it is the 4160 model..I will check the choke out, last night it didn't see to move like it should when I had it off, like releaseing and everything, it would, but wouldn't come completely open.
jeepxj2007 is offline   Reply With Quote
Old August 28th, 2008, 01:43 PM   #8
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default

I bought the carb renew kit...if I go through step by step and replace everything with what is in the kit should it fix it?...the people from holley said it sounds like i am getting a vacuum leak from someplace...and I am guessing the carb itself because it is the only thing I screwed with and before I messed with it the engine was running good.
jeepxj2007 is offline   Reply With Quote
Old August 28th, 2008, 07:44 PM   #9
Cooter
Dad Kickin' It OldSkool
 
Cooter's Avatar
 
Join Date: 12-04-05
Location: Chi-caw-go
Posts: 4,504
iTrader: (16)
Mentioned: 1 Post(s)
Default

If your choke isn't releasing all the way, then you are probably still on high idle.
__________________
Michigan- The Only Great Lakes State South of the Mason-Dixon Line.
Cooter is offline   Reply With Quote
Old August 28th, 2008, 08:19 PM   #10
Sandals
Fucking Zen as Shit
 
Sandals's Avatar
 
Join Date: 11-05-05
Location: Lindenhurst, IL
Posts: 15,320
iTrader: (7)
Mentioned: 1 Post(s)
Default

Quote:
Originally Posted by Cooter View Post
If your choke isn't releasing all the way, then you are probably still on high idle.


yeah, definitely check that!

mine did it the other day and pissed me off for a good 10 minutes
Sandals is offline   Reply With Quote
Old August 30th, 2008, 11:31 PM   #11
jeepxj2007
Senior Member
 
Join Date: 04-19-07
Location: Hope/Sanford/Midland, MI
Posts: 834
iTrader: (16)
Mentioned: 0 Post(s)
Send a message via AIM to jeepxj2007
Default

I cleaned it very well (8 cans of carb cleaner and some brushes) and rebuilt it with the Holley Renew kit, played with the idle mixture adjustment ( 1 turn from bottom out) and she runs great now!
jeepxj2007 is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -5. The time now is 04:12 AM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.16575 seconds with 54 queries