Hey, I really wanna be able to go to the meet on the 13th. I am getting the tags tonight and just got added on insurance. Only one problem...Car wont start. I had everything working fine then decided to yank everything to clean up the engine bay ( It was real bad ). I put everything back together but for some reason I think I may have connected the carb wrong. ( It just wont squirt gas ) Oh and I know my fuel pump IS working and fuel IS getting into the carb.

here is how i think it was setup. the vac advance secondaries are blocked cause mine are mechanical. Someone please help me out here.


thanks in advance, Tim

 

My carb is a bit different. I have the fuel inlet, brake booster (off manifold) and the other nipples are capped.

The Fuel return and vac advance lines you have, I don't.

 

ummm okay.

so.... that doesnt really help me out but i did just try capping everything off and still no workie.

Comon guys, i know someones got the same setup or at least knows something about carbs. Gimme a list of things that could be wrong so i can go through and try out all the possibilities.

 

You see that little silver tube in your feed line? That is the oem fpr that goes in the stock return line, it is also a oneway valve. Take it out of the fuel system entirely. Installed in one direction, it will limit the fuel pressure below the psi needed for the Holley, installed in the reverse direction, it will block fuel supply completely.

Btw, I don't see and aftermarket fpr, have you upgraded the fuel pump? You will need both a better pump and an fpr for the Holley.

 

I have a Holley as well and the first thing I noticed is what Trochoid said. Where is the FPR that allows for 6 psi. Holley needs that plus the high flow fuel pump. As far as the carb, I do not have the same setup either. One line in for fuel with no return and only the vacuum advance to the dizzy. Plus of course the omp.

 

ditto.

 

I didn't notice the fuel return the first time I looked at the pic. I have yet to see a Holley in that series with a return line, all the ones I've seen are deadheaded. Are you sure that isn't a vac source, that the return is hooked up to.

Btw, the fuel supply line, from the tank, at the fire wall, is the is the hardline nearer the engine, iirc.

 

Do you have a plug in the end of the line that goes to the vacuum secondaries ? It looks from the pic that you just have the line running in from nothing but not blocked.

 

did you put the carb upside down?

tap on it with a big screw driver, or lightly with a hammer, with a rag over it...

might not have enough pressure from the stock pump to kick open a stuck seat...

good job on the bay!

 

umm is it even possible to put a carb on upside down? and tap on what with a screwdriver?

 

LMAO no hes asking did you (when the carb was off) have it upside down..if so tap the carb with a screwdriver wooot....

 

oh lol... yeah i did. ahha so just tap on it with a screwdriver? like no place in particular? and also what is a seat? sorry i am kind of a newb when it comes to carbs and I definatley had it upside down for like and hour while i was working on it.

 

Have you looked at you fuel line hook ups yet, they do not look correct?

Holleys do not have return lines. Some fprs do, but the carb doesn't.

 

there is no return on a holley

 

yeah, i originally thougt it was a fuel return cause thats what my friend told me but it is actually just a vaccum port. either way it is capped now. It still will not start though. I feel like i have tried everythign.

 

well im not oging to say i know it all but i might be able to help you a little..you can give me a call 828-201-1334

cheers PaTricK

 

In the last pic posted that shows the supply line. That is the stock return line hose and the silver thing in the middle of it is the stock fpr.

It's gotta go!!!

It is either blocking flow completely, or limiting it to 3.5 psi or less. If you have not moved that line from the fuel lines on the firewal, you are trying to get fuel from the return line, which will not work, even if you have the lines reversed at the pump.

 

o0o0o0o i just found a crucial piece of the puzzle. Gas starts pouring out of that thing that sticks up and looks like a big needle. I couldnt tell before cause its kinda hard to crank the engine while seeing the carb. heres a pic of where the gas comes out...

 

That is a bowl vent, if gas is coming out of there, you either have a stuck needle & seat, float, or way too much fuel pressure (overbearing the needle and seat).

Do you have a fuel pressure gauge? If so, and it's not over the recommended 7psi, I'd suggest making sure the floats aren't stuck.

 

-I removed the stock fpr as was suggested by trochoid.
-I dont have a fuel pressure guage and have really no idea what my fuel pressure is, but i do have a newish fuel pump ( about 6 months old )
-I dont think the floats are stuck because i can easily move them with my finger when i take the side tanks off.
-How could i diagnose a stuck needle and seat? ( I can easily unscrew it and take it out although i will admit im not really sure what im looking for)

 

OK i think im gonna go to autozone or salvo and get a fuel pressure regualtor. So do i just ask for one that does 7psi?

 

This is what the needle and seat looks like. The little pin sticking out the bottom rests on the float arm. As the float rises, it pushes up on the pin, which closes the fuel inlet to the bowl. If you take them out, push up on the pin, and see if it sticks. It should move up freely, and fall back down freely. I believe you can get replacements from the autoparts store for <$15.

However, if you have more fuel pressure than the needle and seat can handle, it will push it open regardless of the condition of the needle and seat.

 

Get the Holley 4-9 psi one, it's 25 bucks. What are the specs on your fuel pump?

 

For FPR, you can get a Holley 4-9psi regulator, should be around $20. Though, you'll need a gauge to see if your pressure is too high/low.

 

thanks for all the quick responses. My fuel pump does about 15psi i think. I am gonna go get that FPR now. Also the needle does rise and fall freely so i guess it is just a pressure problem. I will be back on later after i put this FPR in