1972 Mustang Coupe 302

[cv_72mustang]

How did you tackle the holes below the door/fender ?

 

[Paul Schmidt]

It is always good to start with a clean fuel tank and lines and fresh gas, I have always found it to be money well spent.

Agreed. Anxious to get back and finish it next weekend to see if it solves my running issues. Can't imagine it won't. If not, the only other thing I can think of would be a vacuum issue. But we'll see.

 

[tpj71mach]

Agreed. Anxious to get back and finish it next weekend to see if it solves my running issues. Can't imagine it won't. If not, the only other thing I can think of would be a vacuum issue. But we'll see.

It probably will, but the carb may need to be cleaned if any debris from the tank and old fuel got that far, hopefully it didn't get that far. The fact that it was running, even poorly, is a good sign for the carb, I think.

 

[Paul Schmidt]

Sunday update 11/17. Did all the new fuel lines, did all new hoses, got the new gas tank in, filled her about half a tank with new gas, sending unit seemed to be fine....but no major change in terms of running. You can see for yourself she is still speening up slowing down....seems to be struggling. Granted I did't run her for very long and I am going to take her out for a spin...maybe she just needs some run time.

I'm kinda at a quandary at this point. Not sure what else to check seeming everything is practically new on the car. Only thing I can think of is vaccum. And I'm not overly familiar with how these vaccum systems are set up. I'm not sure if I have a hose off somewhere or what. Not sure if I need to redo the plugs...any recs are appreciated.

Litte frustrated considering the amount of work it took to redo that whole fuel system.

 

[cv_72mustang]

I'd take it for a drive and see what it drives like. Sounds like it's missing a bit. Under driving load will add more insight. You're getting there!

 

[Paul Schmidt]

Update 11/18.

Most likely am going to call in my mechanic at this point to see what's up. Took her for a drive for about 45 minutes..no change....ran rough...again choking to almost a stall when you come to a light, runs and has power when you're on the gas...but otherwise struggles when coasting, slowing down and coming to a stop...and I am out of ideas. The only thing I just thought of is maybe there is a hose disconnected or some kind of vaccum issue that's not correct, so I took the following video for suggestions. I may not be seeing something blatantly obvious in my set up or connections that I either have missed, or just not familiar with. In fact this may be one of those moments where someone goes "dude has no idea what he's doing"



As you'll see in the video, this is my setup. I've got your standard oil breather running to the manifold, I have the carb vaccum running to the pump.I have the fuel line and fuel filter running to the carb from the pump. I have a PCV breather on the other valve, which is where the old elbow ran a hose to the cleaner before I swapped it out for an aftermarket...but in the back where the vaccum tree is, I have one hose that's capped and another just unattached. And that unattached hose was never attached to the old carb when I started either. Am I missing a crucial connection or airflow/vaccum issue? I am out of ideas at this point.

- PBR

 

[Sheriff41]

Update 11/18.

Most likely am going to call in my mechanic at this point to see what's up. Took her for a drive for about 45 minutes..no change....ran rough...again choking to almost a stall when you come to a light, runs and has power when you're on the gas...but otherwise struggles when coasting, slowing down and coming to a stop...and I am out of ideas. The only thing I just thought of is maybe there is a hose disconnected or some kind of vaccum issue that's not correct, so I took the following video for suggestions. I may not be seeing something blatantly obvious in my set up or connections that I either have missed, or just not familiar with. In fact this may be one of those moments where someone goes "dude has no idea what he's doing"



As you'll see in the video, this is my setup. I've got your standard oil breather running to the manifold, I have the carb vaccum running to the pump.I have the fuel line and fuel filter running to the carb from the pump. I have a PCV breather on the other valve, which is where the old elbow ran a hose to the cleaner before I swapped it out for an aftermarket...but in the back where the vaccum tree is, I have one hose that's capped and another just unattached. And that unattached hose was never attached to the old carb when I started either. Am I missing a crucial connection or airflow/vaccum issue? I am out of ideas at this point.

- PBR

If that open vacuum hose is pulling vacuum it needs to be plugged off. Also, is the engine warm in this video? If so, the choke is closed tight and that will cause problems. Even if the engine is cold you may want to back that choke off a bit so it's not shut tight.

 

[Paul Schmidt]

If that open vacuum hose is pulling vacuum it needs to be plugged off. Also, is the engine warm in this video? If so, the choke is closed tight and that will cause problems. Even if the engine is cold you may want to back that choke off a bit so it's not shut tight.

The engine was not warm, as I didn't run it today or prior to taking the video. I'll back it off and see if that makes a difference. I will also check if that open hose is pulling vacuum.