Engine Newbie here with some Carb/Vacuum problems with video

[LaserBear]

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 AMC 258 i6 / 4.2l 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

 

[CJ]

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 Transmission 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.

Search results for query: vacuum

jeep-cj.com

Haynes CJ 1949 - 1986 Repair Manual

Haynes CJ 1949 - 1986 Repair Manual

jeep-cj.com

1976 Complete Technical Service Manual - CJ5 CJ7 Cherokee Wagoneer Truck

1976 Complete Technical Service Manual - CJ5 CJ7 Cherokee Wagoneer Truck

jeep-cj.com

Cj7 Vacuum Hose Diagram : 258 Vacuum Line Routing A Round Of What Is This Ecj5 :

Cj7 Vacuum Hose Diagram : 258 Vacuum Line Routing A Round Of What Is This Ecj5 : - Dietrichimg01

dietrichimg01.blogspot.com

 

[WHATROAD]

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.