I’m looking to tap into the brain trust of the zenith experts to help troubleshoot my situation. I’m certainly no expert here but learning many of the nuances of these carbs quickly. I’m set on wanting to make these work as I switched back from Webers as I value the originality in this case.
I purchased 2 fully rebuilt zenith carbs. They look beautiful... but clearly once clearly has some issues that I need to sort out. I installed as is initially after correcting what I understood needed to be done with bench settings which were way off. Carbs were rebuilt with the inferior Walker rebuild kits also for whatever that’s worth. Knowing it was the walker I went back and trimmed the gasket that can restrict float movement just in case. Additionally I noticed the replacement accelerator pumps that were installed were binding up so I pulled an original pair out of an old set of carbs I had and used those instead with with new rubber gaskets. This seemed to work well. The carbs have the replacement float valves installed (with the pin, not the bearing). I left those in as they seem fine but debated putting back in the original. Not sure if I should be checking anything else.
Issue: One carb seems to be operating as it should. My issue seems to be with the other carb. On that one, it seems to be dripping a lot of gas into the throttle body. Not out of the overflow tube, just the regular spot but it’s dripping rather fast. Also, when I attempt to adjust the air mixture screw no matter how much I adjust it seems to make no difference in how the car runs. I would think the obvious assumption is that I have a bad vacuum leak somewhere but I’m not finding it but maybe not looking in the right spots either. I should say that this is the carb that I have the vacuum hooked up for the brake booster as well as the distributor. One other thing I noticed is when idling if I reach underneath and activate the secondary mechanism, the carb that seems fine revs up smoothly. When I perform the same on the leaking carb it bogs down. I think that’s it on what it most recognizable as being off.
Any advice on if this sounds familiar and how to tackle trouble shooting would be greatly appreciated.
I purchased 2 fully rebuilt zenith carbs. They look beautiful... but clearly once clearly has some issues that I need to sort out. I installed as is initially after correcting what I understood needed to be done with bench settings which were way off. Carbs were rebuilt with the inferior Walker rebuild kits also for whatever that’s worth. Knowing it was the walker I went back and trimmed the gasket that can restrict float movement just in case. Additionally I noticed the replacement accelerator pumps that were installed were binding up so I pulled an original pair out of an old set of carbs I had and used those instead with with new rubber gaskets. This seemed to work well. The carbs have the replacement float valves installed (with the pin, not the bearing). I left those in as they seem fine but debated putting back in the original. Not sure if I should be checking anything else.
Issue: One carb seems to be operating as it should. My issue seems to be with the other carb. On that one, it seems to be dripping a lot of gas into the throttle body. Not out of the overflow tube, just the regular spot but it’s dripping rather fast. Also, when I attempt to adjust the air mixture screw no matter how much I adjust it seems to make no difference in how the car runs. I would think the obvious assumption is that I have a bad vacuum leak somewhere but I’m not finding it but maybe not looking in the right spots either. I should say that this is the carb that I have the vacuum hooked up for the brake booster as well as the distributor. One other thing I noticed is when idling if I reach underneath and activate the secondary mechanism, the carb that seems fine revs up smoothly. When I perform the same on the leaking carb it bogs down. I think that’s it on what it most recognizable as being off.
Any advice on if this sounds familiar and how to tackle trouble shooting would be greatly appreciated.