67442nut

After 12 years of being parked in the garage, I finally got the '67 CS post car road worthy......I thought.
I won't go into everything I've done to it, but, I did replace the original fuel pump with a stock style relacement
I bought online.
I'm having multiple fuel system problems.
When the car sets overnight, I have to prime it to start it.
After it is started, it starts OK without priming for the rest of the day.
Once I was idling in park while waiting for someone.
It stalled and wouldn't start until I primed it again.
When cruising, it cuts out like it's starving for fuel.

I've had 3 different carburetors (Quadrajets) on it. It acts the same with all 3.

I know I need to install a fuel pressure gauge to see what's happening.
I just haven't taken time to get one and install it.
I was hoping someone else has experienced the same symptoms and knows the cure.
I suspect the new fuel pump is bad.

It didn't really need it, but I removed the gas tank and cleaned it.
Sending unit/fuel pick-up is new.
Front-to-back fuel line was blown out. One of the carbs I used is a new re-man.
Another is the original carb that I rebuilt a while back. It was in good working order after the rebuild.
The third was a carb off a parts car that was in excellent working order when removed.

I may install an electric fuel pump whether it is or not.
Need some advice on the best fuel pump for a "driver" application.
Don't need anything exotic. This is a stock 330 4 barrel.
I know this is a small block, but, I have a '67 4-4-2 drive train I may install, so,
the new fuel pump may need to be able to feed a 400 engine eventually.
Any input will be appreciated.

oldcutlass

Put a gauge on it and see what kind of pressure your running. Any electric pump regulated down to around 6-8 lbs would work.

Nasty455

Nothing wrong with priming the carb.
One pump of the pedal is usually sufficient.
Just how the carb works...don't expect fuel injection operation.
Change out the bronze fuel filter and maybe add a plastic inline so you can see whats happening.
Are you running hei ignition?
symptoms seem like module failure...

67Olds442X2

Sounds like a bad pump. An electric pump would be over kill for your car I think. Pull the feed line from the carb and have someone crank the motor. Pull the coil wire first and direct the line into a container. This will tell if the pump is good. Doesn't take much cranking to get flow.
I believe the pumps are different for a 330 and 400 (442) because of the return line.
By priming are your pouring gas in the carb?
I run a Mr. Gasket mech pump and I feed 2 four barrels with no problem.

67442nut

I don't have a problem with pumping the pedal a few times. That's standard procedure on a cold carbureted car.
I can't pump the pedal enough to get it started.
When I say "prime it", I mean pouring gas directly into the carb.
I think the pump has barely enough pressure to keep the engine running, but, not enough to
keep pressure on the carb to start it cold.
Like I said previously, it acts like it's starving for gas at cruising speed.

67442nut

Yes, I mean pouring gas into the carb.
In anticipation of installing the 4-4-2 drive train,
both the new fuel pump and new fuel pick up at the tank
I installed have the nozzle for the return line.
The 330 has no return line.
I have the return line nozzles plugged off at both ends for now.
Although I don't think that's the problem, I have to wonder.

67442nut

Yeah, I really need to go ahead and install a gauge to pin down the problem.

compedgemarine

also make sure the tank is well vented. it is possible that you are pulling a vacuum on the tank and you are not driving it enough right now that it is reaching the point of starving it. if it is pulling a vacuum the pump may pull enough to run for a while but if it sits long enough it could pull the fuel back to the tank.

67442nut

The old "A" body Oldses (and [probably the full size, too) have a double vent line setup on the back of the tank
which is nothing more than a 1/2" nozzle and 1/8" nozzle on the back of the tank
with about three feet of fuel line attached.
I put new lines on those nozzles after the tank was cleaned.

compedgemarine

I know how they work the point is I have worked on several with that problem and was told that was all new. one had the vent lines caught under the strap and pinched off and another had a wasp nest in the end plugging it off. I recently had a 1974 corvette with 9000 original miles on it because the original owner said it would lay down and die so he parked it. turned out the factory kinked a hose in the back by the tank. I dont doubt that it is all new just saying to recheck it all to make sure.

john paul

i have the exact same problem with my Olds. I have to prime the carb at least 3 times before it will stay running.. you said you prime it by pouring fuel directly down the carb throat. not really a safe way to do it. i bought one of those labratory squeeze bottles with a long tube and just inject fuel into the carb float bowl vent, about 4 ounces is good and pump the pedal about 5 times and away it goes. once it stays running, it works great, no hesitation or starvation, i just don't get it. I have replaced everything in the fuel system so far and it is still doing it. new carb, tank, float pickup, fuel pump, all new lines and im still no further ahead. i would hate to go electric, for i like to keep it all original if you know what i mean.

Oldsmaniac

Ed that is a sweet 67!

oddball

Acquire/make an anti-drainback valve. Some fuel filters even have them integrated.
If that doesn't do it, then the carb is probably leaking through the fuel wells.

john paul

Thanks for the suggestion oddball, sounds like a really good idea and relatively easy to do.
John paul