Have a gslse that i am converting to a weber. I am using a regulator and stock gslse fuel pump. The car starts ( fuel psi registers 4 psi) but then fuel pressure drops to 0 and a min or two later the car dies. Any ideas? Need more info? Let me know and thanks in advance.

 

I think the stock pump puts out too high a pressure for a low press carb regulator. But Im a carb guy so I dunno fer sure.

 

well i should be more specific then the regulator i am using has a return line to bleed of excess pressure and was made for a turbo application ( which i plan to do in a couple months) and bumps up the fuel psi for evey psi of boost. Help any Carl?

 

You may be getting power to the pump cut off by the computer because of funky flow. ...Maybe as a saftey precaution?

Try wiring a 7lb pump with regulator directly to the battery and a switch. This will give you a place to start.

 

Does it do that? and how does it cut the fuel with a relay of some sort? and if thats the case can i bypass it?

 

Well, I'm guessing, as I've never had an SE ( )-
But there's a fuel-cut relay in the 12a FBs.
You can bypass those, but I don't know about your's. I think your computer may dick with your timing and what-not.

I'm guessing.

 

repost

 

Sterling may be onto something (he's too damn smart!) . Is the regulator hooked up to function as a rising rate? It might actually be the regulator killing the fuel flow too. Maybe try one of those cheap dial regulators just to see if thats the problem.

 

-If I am, it's because I blindly stumbled onto it!

 

I believe that Sterling is onto something also my question is where is it and how do i bypass it.

The regulator is a rising rate reg but i have the boost input capped off so no vac comes through the regulator right now.

I am going to chase the relay for now if i try it and it still wont stay running i am going to look at the regulator.

Thanks fellas, may have to hit you guys up for a carb when i get my hands on a 12a 7

 

I dont have my manual with me, but Im sure the answer is in there.

Should the boost reference line be capped? I would think it should be open to atmosphere?
Good luck.

 

HMmm ill make some calls on the boost refrence today and ill be hitting the books at lunch and after work to see if i can get this worked out.

Thx Carl and Sterling you guys are top notch!

 

Yeah, I was thinking that it should either be open to atmosphere, or hooked to the manifold as usual. Because that way, you set the fuel pressure when the regulator is under maximum vacuum. Otherwise, youre setting it at atomospheric (engine not running, or with port plugged), and then when the engine starts, the regulator senses vacuum, so it tries to drop the pressure as if youre coming off boost.

~T.J.