Scott's build of a 1981 CJ8 Scrambler

WJCO said:
If you remove the air filter and crank the engine, you should be able to visibly see if fuel is getting into the engine. Looking at the bag, it looks sufficient. As suggested above, you may want to pull a spark plug or two just to make sure it's not flooded.
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As in actually unscrew the white plug from the engine?

IMG_20170818_143115.jpg
 
GraniteCrystal said:
As in actually unscrew the white plug from the engine?
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Yep. Either a 5/8" or a 13/16" socket. Do one at a time so the right wire goes back on the right plug. You may need a specific length socket to make sure it goes all the way down. Most tool kits include them now anyways.
 
WJCO said:
Yep. Either a 5/8" or a 13/16" socket. Do one at a time so the right wire goes back on the right plug. You may need a specific length socket to make sure it goes all the way down. Most tool kits include them now anyways.
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If it is flooded, web said to start it with pedal to the floor. Just did that and it did start, with a big black cloud.
 
GraniteCrystal said:
If it is flooded, web said to start it with pedal to the floor. Just did that and it did start, with a big black cloud.
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GraniteCrystal said:
Startup video:

https://youtu.be/_Qvhu4bU0QI
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Black smoke is fuel. You are indeed running rich. With your foot on the pedal, you are opening throttle plate for maximum air which is making the mixture less rich, that's why the vehicle started. So now you need to find out WHY it's running rich. I would definitely find out what fuel pressure specification is and get a manual fuel gauge and find out your pressure. If pressure is in spec, then it's likely a jet as already mentioned earlier in this thread.
 
Also noticing that if I pull the linkage all the way back, the butterfly valves only open to here
IMG_20170818_150848.jpg

But I can open them by hand to here
IMG_20170818_150855.jpg
 
GraniteCrystal said:
Also noticing that if I pull the linkage all the way back, the butterfly valves only open to here

But I can open them by hand to here
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Normal for the choke circuit.

EDIT: I should say, it's normal for it to be in multiple positions depending on temperature. Sorry. Not saying it's set correctly, just saying that it may be completely normal like that.
 
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Missed this thread so congrats!! That is a clean looking CJ. Good find. Subscribed!

I remember being in the exact same shoes as you are haha.. I could drive mine but it just never ran well. Mine would "pop" under acceleration. That was a timing issue and sounds similar to something you described. Didn't see if that had been checked.

I ended up trashing my electric choke and swapping it out for a manual choke, but don't think that was necessary looking back.


And just throwing a Hail Mary out there, I saw the Jeep was from Miami. Maybe the carb has the same jets from back then and needs to be re-jetted for being at a higher elevation now? I'm no expert but maybe it could help?

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Breer said:
Missed this thread so congrats!! That is a clean looking CJ. Good find. Subscribed!

I remember being in the exact same shoes as you are haha.. I could drive mine but it just never ran well. Mine would "pop" under acceleration. That was a timing issue and sounds similar to something you described. Didn't see if that had been checked.

I ended up trashing my electric choke and swapping it out for a manual choke, but don't think that was necessary looking back.


And just throwing a Hail Mary out there, I saw the Jeep was from Miami. Maybe the carb has the same jets from back then and needs to be re-jetted for being at a higher elevation now? I'm no expert but maybe it could help?

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That's definitely a possibility but previous owner said he already did that. Here are some pics of the jets. Can you tell?

IMG_20170817_230426.jpg

IMG_20170817_230445.jpg
 
GraniteCrystal said:
Also noticing that if I pull the linkage all the way back, the butterfly valves only open to here
View attachment 273215

But I can open them by hand to here
View attachment 273216
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Its been a real long time, but if that is the throttle linkage that will only open the plates that far, that seems extremely restrictive to air flow. You mean throttle to the floor and that's as wide as they will open?

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BobNH said:
Its been a real long time, but if that is the throttle linkage that will only open the plates that far, that seems extremely restrictive to air flow. You mean throttle to the floor and that's as wide as they will open?

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Yeah. I thought the same thing. Working on adjusting that today.
 
GraniteCrystal said:
Yeah. I thought the same thing. Working on adjusting that today.
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Good luck, because I hate to see a jeep like that sidelined. I miss my 83 cj-7 laredo. It was my first jeep, and I was waaaaay too young and stupid to appreciate it. 30+ years later and I still kick myself for it.

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GraniteCrystal said:
While waiting on insight for my carburetor problems, I took the time to install a new shifter boot.

Old


New
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Sometimes the little things make big differences! Looks great!

And I don't know much about the jets themselves to know which ones are correct in that picture. Maybe someone else can chime in about that. Us flatlanders over yonder don't mess with them things much.

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I'm not too familiar with the carb, but typically the choke will only open to a certain point then it opens all the way based on temperature, etc. Do some research on that CARB's choke circuit before you start adjusting too much. What kind of carb is it? I may have some old books I can look at.
 
WJCO said:
I'm not too familiar with the carb, but typically the choke will only open to a certain point then it opens all the way based on temperature, etc. Do some research on that CARB's choke circuit before you start adjusting too much. What kind of carb is it? I may have some old books I can look at.
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Weber 38DGASM
 
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