Weber Carb issue

[bugeye88]

LR,
Well if the electric pump is pumping well into a container then its not just the mechanical pump. Next guess would be crud in the carb. Webers are extremely sensitive to crud blocking the many and various jets in various models of Webers. Look at the jets in the carb and place a in-line filter after the electric pump.

Rob
Bugeye88

[Contractor]

Well I wish that worked . . . Got a pump temporarily wired it in and plumbed it right between the mechanical fuel pump and the carb. Let it pump fuel and then tried to start - got a big fat nothing, exactly the same as the mechanical pump. It definitely was pumping because I used it to pump a bit of extra gas into the carb throat and it started right up.

I am pretty convinced it is the accelerator pump . . . any other thoughts?

I am no expert, but I fail to see the connection between a hard start and the accelerator pump?

Maybe someone else will chime in.

[SafeAirOne]

I am no expert, but I fail to see the connection between a hard start and the accelerator pump?

My money would be elsewhere too, since the function of the accelerator pump is to inject extra fuel into the throat of the carb to keep the engine alive and revving up until thee vacuum can catch up and draw fuel in the normal way during strong acceleration events.

[LaneRover]

Whether or not it is THE issue it does have issues . . .

maybe I am thinking about it wrong but if it's the job of the accelerator pump to squirt fuel down the throat of the carb and the truck starts well after pouring some fuel down the carb then I see a connection. Thank you for all the help - I hope I won't need more for this issue after I try this fix!

[yorker]

maybe I am thinking about it wrong but if it's the job of the accelerator pump to squirt fuel down the throat of the carb and the truck starts well after pouring some fuel down the carb then I see a connection. Thank you for all the help

most kind of work that way so it should help. See :
http://42fordgpw.com/pdfs/solex.pdf

Different carbs but it describes and contrasts how they work for starting.

[LaneRover]

most kind of work that way so it should help. See :
http://42fordgpw.com/pdfs/solex.pdf

Different carbs but it describes and contrasts how they work for starting.

That actually helped (I think). I was able to do a bit of fiddling and it looks like the choke isn't closing completely either, and I saw gas down in the base of the intake manifold so I know that some gas is starting to get through. I ran out of time last night so I let you know more once the fiddling is done.

[LaneRover]

OK, so after replacing the accelerator pump (which was needed) and correctly reconnecting the choke so that it will close completely the Rover starts A LOT better. I think it was a bit of both but neither one or the other alone. The article Yorker wrote helped me understand a bit more about carbs and realize the choke was part of the problem.

Thanks everyone for your help!