Engine Newbie here with some Carb/Vacuum problems with video

Engine Newbie here with some Carb/Vacuum problems with video

LaserBear

Jeeper
Posts
5
Thanks
1
Location
Michigan
Vehicle(s)
1976 CJ-7 258
Hey all!

I just joined to hopefully learn and share my experiences working on my old Jeep and getting it to modest restore!

1976 CJ7 with a 258 and Carter YF. The Jeep is in very good condition, I’ll share pics soon enough. I did try to search for my specific issue but couldn’t find anything that might help me. Again, I’m new at this and while I have a basic understanding of vehicle mechanics and I’m not afraid to turn a wrench, some of this stuff is just Chinese to me.

I’ve made a video, I was wondering if anyone can help me figure out these vacuum lines.

Some context: motor idles decent and even revs up nicely with some backfires from carb. Wants to die under quick throttle.

I’ve replaced several parts and have gotten it to run considerably better but issues still persist.


View attachment Vaccum.mp4

NOTE: Embedded Video - CJ
 
Last edited by a moderator:
:welcome:
Good video.
Question...
You say that your doing a "modest restore"? Does that include all or some emissions or just drivable since Michigan does not have testing?
The most basic of vacuum lines needs to be advance only.
Since you have a manual trans and brakes, all else can be bypassed.
I see a new fuel pump, have you rebuilt the carb?
Do you have any vacuum leaks (checked by spraying various places @ idle with brake clean or ether and looking for an idle change)?
How steady is the timing mark when running up the RPM's with advance connected and disconnected (plugged)?
What is the total advance?

Here are some diagrams we have on line in our documents and resources as well as a Haynes and a FSM and a great web link.

 
You can also scroll down and take a look at the diagram provided by TSB8C for the inline 6 manual transmission located in the latest resource section.
 

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