Carb question, need to dump little gas in carb just to get car started Options

[angerosa]

Seems that this year I need to put a little gas into the carb to get the car started initially. I have single Solex carb that no one seems to be able to identify. I'm sure some PO just pulled it off something that was sitting in a junkyard. Once I get car started and it warms up it idles OK but runs rough when you try to drive it. Timing is spot on. Recent (not too many miles ago) tune up with the help of some very knowledgeable 914world brethren. Let’s say it’s a given that there is nothing wrong with the engine. I have an idea of where to go next. I’ve had car for about 7 years. With only what I’ve told you here what’s your opinion?

[Mike Bellis]

That's a big gap between the cam and pump arm. It almost looks like something is missing. A link maybe? Can you post some more pics of the cam and pump from different angles?

The cam should push the pump as soon as it moves from the idle position.

[ThePaintedMan]

That's a big gap between the cam and pump arm. It almost looks like something is missing. A link maybe? Can you post some more pics of the cam and pump from different angles?

The cam should push the pump as soon as it moves from the idle position.

I see what Mike is saying. I still can't quite figure out how it actuates from the picture, but if that bottom cam is the throttle cam, the two should be tied together somehow.

The accelerator pump actuation is adjustable though. I see the little screw on the end of the arm where it pushes down on the diaphragm itself. Don't mess with that though - follow Mike's thinking - how does the throttle lever push the arm down.

Edit:
http://www.shoptalkforums.com/viewtopic.ph...64&t=139538

I can see it in the diagram down toward the middle of the thread (part #29), but it's hard to tell in the picture if the pump actuating cam is situated with the throttle full open. It should close at some point when the throttle is completely off idle and into the main.

Jason, while you have it out, you might also replace those black vacuum plugs at bottom front side of the carb. If those are cracked or leaking it can wreak havoc with drivability.

[angerosa]

That's a big gap between the cam and pump arm. It almost looks like something is missing. A link maybe? Can you post some more pics of the cam and pump from different angles?

The cam should push the pump as soon as it moves from the idle position.

I see what Mike is saying. I still can't quite figure out how it actuates from the picture, but if that bottom cam is the throttle cam, the two should be tied together somehow.

The accelerator pump actuation is adjustable though. I see the little screw on the end of the arm where it pushes down on the diaphragm itself. Don't mess with that though - follow Mike's thinking - how does the throttle lever push the arm down.

Edit:
http://www.shoptalkforums.com/viewtopic.ph...64&t=139538

I can see it in the diagram down toward the middle of the thread (part #29), but it's hard to tell in the picture if the pump actuating cam is situated with the throttle full open. It should close at some point when the throttle is completely off idle and into the main.

Jason, while you have it out, you might also replace those black vacuum plugs at bottom front side of the carb. If those are cracked or leaking it can wreak havoc with drivability.

I might but remember my week this week and I'm trying to make the show on Sunday. I'll give them a close examination. I could do that with the carb on the engine.