Originally posted by Lindel
Carburetors in general, Holley's in particular; AKA Carb Tech
Collapse
X
-
My carb now rests in the hands of a Holley god. He spent 1 minute scanning in his book and had the rebuild kit in his hands in under a minute. Then offered to rebuild it for me for $45. I'll let you know how it turns out.
ToyJeep,
I asked him about your idle and he suggested it may be a vacuum problem. He also said it could be the voltage on your electric choke. He was actually leaning towrds the choke voltage as the culprit.Tom Gibson
1980 J20 Utility bed truck. Factory cab and chassis truck. Many new mods for it but it will look all stock.
1985 J10 nothing special just a nice clean stock truck.
1977 Honcho "Blue" 401/400/quad. Under going major upgrades.."This is Not Your Fathers Honcho", it may not even be a Honcho anymore when done.
2017 Challenger. Very jealous of the Jeeps.
Comment
-
-
Originally posted by HOOT
ToyJeep,
I asked him about your idle and he suggested it may be a vacuum problem. He also said it could be the voltage on your electric choke. He was actually leaning towrds the choke voltage as the culprit.'Pepper' -- '77 Cherokee w/ 360/435/203/205/HP60/14B/42's
Comment
-
-
ToyJeep, I had a similar problem with my choke. My dad (ex-mechanic and carb genius) tried adjusting the choke and couldn't get it dialed in so he bypassed it. When we rebuilt it last weekend, we noticed during reassembly that it was not assembled right from the beginning. There was no way possible that the choke would ever allow the flapper to close the way it was assembled. We took a closer look, and changed the way we assembled the choke lever (the red plastic looking piece) and voila, problem solved. I have not yet tried it cause the tranny is currently removed, but I will let you know the results as soon as it goes back together. I will also try to take some pics to show you what I am talking about, as I really don't know carb nomenclature.Joey
Jeep-Less
Comment
-
-
I'm trying to decide wether or not I need to rebuild my MC 4350. I just bought the '78 Cherokee. It had to have a liberal spraying of started fluid and several attempts over a 20 minute period to get it started when I went to pick it up. Once it cranked it ran great. Cruised between 70 and 80 all the way home, about 35 miles.
I've been told the floats "get stuck" when older carbs sit for a while without being run. This one was a daily driver for a year, then was started periodically over six months until I bought it.
Any leads?
Comment
-
-
Originally posted by wickedwagon767I'm trying to decide wether or not I need to rebuild my MC 4350. I just bought the '78 Cherokee. It had to have a liberal spraying of started fluid and several attempts over a 20 minute period to get it started when I went to pick it up. Once it cranked it ran great. Cruised between 70 and 80 all the way home, about 35 miles.
I've been told the floats "get stuck" when older carbs sit for a while without being run. This one was a daily driver for a year, then was started periodically over six months until I bought it.
Any leads?
My 2300 had just the opposite issue, the float stuck in the open position and poured gas out the top vent. I did a complete rebuild due to the 41 year age and unknown maintanence history.You might worry less about what most people think, if you understood how rarely they do.
67 Kaiser J3000, 327 vigilante, D44/D53, less than average rust. Currently "asthetically challenged"
05 TJ, wheelin rig.
Comment
-
-
Originally posted by KemanIs it one with a float level view hole? Should be a bolt or screw on the side of the bowls. If it is, open the view hole and spray carb cleaner into the float bowl. That may clean enough gunk to release it.. Otherwise, get gaskets and pop off the float bowls and clean them manually. way less that a full rebuild, and should take less than a half hour.
My 2300 had just the opposite issue, the float stuck in the open position and poured gas out the top vent. I did a complete rebuild due to the 41 year age and unknown maintanence history.
I'll take a closer look for a view hole
Comment
-
-
You'll probably have to buy a complete kit to get the diaphram, but it's an easy fix on the 2150. It's on the front of the carb, and at worst it's messy. Don't do with the engine hot.
2150 is an excellent carb, especially for off-road. It's down side is that it's not very big (only around 350 cfm), and the top can warp fairly easily.Jeep Grounds
RRV Homepage
Texas Full Size Jeep Association
1987 Grand Wagoneer
AMC 360/TF727/NP229
1999 Wrangler Sport
4.0L/AX-15/NV231
?Freedom is never more than one generation away from extinction? by Ronald Reagan.
Formerly of DFW/Gun Barrel City, TX - eventually to return...
Comment
-
-
Originally posted by LindelYou'll probably have to buy a complete kit to get the diaphram, but it's an easy fix on the 2150. It's on the front of the carb, and at worst it's messy. Don't do with the engine hot.
2150 is an excellent carb, especially for off-road. It's down side is that it's not very big (only around 350 cfm), and the top can warp fairly easily.
Comment
-
-
You could try vise grips, or if there's a carb rebuilder near you then give them a try.
Is there enough to get a pair of vise grips on them?Jeep Grounds
RRV Homepage
Texas Full Size Jeep Association
1987 Grand Wagoneer
AMC 360/TF727/NP229
1999 Wrangler Sport
4.0L/AX-15/NV231
?Freedom is never more than one generation away from extinction? by Ronald Reagan.
Formerly of DFW/Gun Barrel City, TX - eventually to return...
Comment
-
-
Originally posted by LindelYou could try vise grips, or if there's a carb rebuilder near you then give them a try.
Is there enough to get a pair of vise grips on them?
A drive around the block and I can only top her out at about 25mph. I'm missing the driver side exhaust manifold down pipe. Could no back pressure do this?
Comment
-
-
Holley 2300 adjustments
I am curious to know when the accelerator pump arm is supposed to start moving on this carb. Is it supposed to be at the same time the throttle starts to open.
When you start out in gear or jab the accelerator quickly, it will spit or miss, then idle fine or run fine once you get moving.
I noticed the pump arm doesn't move until the throttle is partially opened. I have a spare Holley and the arm moves immediately when the throttle is moved.
There is no mention of an adjustment in the manual. Is it ust trial and error until I find a good spot? I overhauled this carb during the summer.'64 J200 thriftside
'67 J2000 townside custom cab
'68 Jeepster Commando
'69 Super Wagoneer
'75 J10
'79 Cherokee S WT
'75 Cherokee
'61 Aristocrat Lil Loafer
Comment
-
-
Chris, I've always adjusted the accel pump (on a Holley) so that I can blip the throttle (in park) and it doesn't stumble or hesitate. It's always worked for me.
If you go to Holley's website, you should be able to find the initial tune up for installing it. That has all the adjustments you need to do out of the box.
AMC, on yours I don't think that back pressure (or lack of) would be your problem. It's most likely carb related, and probably a choke adjustment. It may very well be a vacuum leak, these monsters are prone to that. Look to see if the PCV hose has come off the back of the carb. If it's not vacuum, look at the choke.Jeep Grounds
RRV Homepage
Texas Full Size Jeep Association
1987 Grand Wagoneer
AMC 360/TF727/NP229
1999 Wrangler Sport
4.0L/AX-15/NV231
?Freedom is never more than one generation away from extinction? by Ronald Reagan.
Formerly of DFW/Gun Barrel City, TX - eventually to return...
Comment
-
-
Originally posted by LindelChris, I've always adjusted the accel pump (on a Holley) so that I can blip the throttle (in park) and it doesn't stumble or hesitate. It's always worked for me.
If you go to Holley's website, you should be able to find the initial tune up for installing it. That has all the adjustments you need to do out of the box.
AMC, on yours I don't think that back pressure (or lack of) would be your problem. It's most likely carb related, and probably a choke adjustment. It may very well be a vacuum leak, these monsters are prone to that. Look to see if the PCV hose has come off the back of the carb. If it's not vacuum, look at the choke.
I'll check around the carb.
I've ordered a Haines manual and hopefully it will help me. Other people I spoke too also concluded that the down pipe should not make a difference. My carb is probably way out of wack. Should the butterfly valve flap open/closed when throttling? If so mine does not.......
Again I would like to get it rebuilt but I'm just trying to get the Jeep to run as best as possible with little $ down. Just to see what I have and go from there.
Comment
-
Comment