- Joined
- Apr 14, 2019
- Messages
- 588
- Reaction score
- 384
- Location
- Center Valley , PA18034
- My Car
- 72 Vert 351C White
How did you tackle the holes below the door/fender ?
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 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.
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.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.
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
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.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.
Going to do this asap. Been digging into the research on this over the past couple days...specifically because I now am thinking I have a head gasket issue. There are no visible leaks of any coolant or fluids...however I am finding that I am checking off the boxes on many of the symptoms. I ran through an initial check list below:PBR: run a compression and leakdown test. You will better zero in on what's going on with your engine. Both tests are simple and provide valuable insight.
PBR you may want to look inside the fuel bowl to see if it has any trash in the bowl. As previously stated by tpj71mach the trash could have gotten inside the fuel bowl to cause idle and starting and running issues.Hope you all had a great thanksgiving. I have a question / theory that I came across yesterday and because neither myself, nor my pops (who came to visit for the holiday) are carburetor experts, he suggested I throw it out to you guys.
Him and I went out to tinker with the car and possibly continue the diagnosis of why she suddenly won't start, but cranks. We checked all connections and everything, did a top to bottom, and then tried giving her a start so he could see what was going on. So, I got in the car, tried starting her and she just cranked. He went under the hood and adjusted the flange on the carb and she started...roughly...but started....I rev'd her a couple times and then when he let go, she choked out. Now...that does say that the carb certainly seems to be in need of an adjustment..which could be causing the issue, however, he is the main thing we came across.
I'm aware that when you are holding the carb open and rev'ing her, you're going to get spurts of gas. However, when he was holding it open, and I rev'd her...he said gas was "flowing out and over" from the carb...like a lot of gas. overflowing up and out with each rev. Not a spurt, but alot. So we went back in and found some videos on carb adjustment and float adjustment to regulate fuel flow. It seems pretty technical, but I can probably figure it out with the proper spec sheets.
Now here's the theory that we came up with, but again, we may be way off base and I'd like your thoughts.
When I put the new carb in, I didn't do any adjustments...she ran fine. However as I ran her longer over the months, I know those old fuel lines, filter and tank were probably full of crap and clogged. She started running rough. It was getting fuel, but not cleanly or in the right amounts. Now that I have all clear and clean fuel lines, along with clean fuel and fuel filter, is it possible that the clear fuel flow is pushing too much gas into the carb and flooding it causing it to choke out? Hence the overflow of fuel? If thats the case then I assume, based on the videos I watched that I would need to not only adjust the carb settings, but I would also have to open an adjust the float inside to ensure that its not allowing too much fuel in?
That's our theory. Does that seem realistic and we're onto something? Or am I barking up the wrong tree? It seems like it makes sense...the car was running rough and stalling because of clogged lines and the carb was just managing to make it work enough to run. Now that there are no blockages and it has a clear path, its getting a pure flow and too much fuel is coming through to the carb causing it to flood and choke out.
Now again, this all may still be a moot point and it could be a head gasket. I was not able to do the compression test because I can't get her to start and stay running. So I am now backtracking to the carb as a starting point. At the end of the day, she is getting gas. She has spark. She has power. After all of the things I've done on her, I can only think of carb settings and head gasket as being the remaining culprits.
Anyway, pops and I wanted to see if anyone had thoughts on our hypothesis. I don't know much about carbs and or adjusting them, but I'm doing the research.
-PBR
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