I have a 260z was running last weekend and now quite then it will crank and run but give it a min and it turns off like you turn the key off

And ideas

Sounds like the flux capacitor to me, you need to go back to last week.

Naw, I'm kidding. You'll have to give a lot more hints to the problem. I'd start by looking at the spark plugs.

If you're not using it as a daily driver, you might want to invite me over next weekend.

Ok it's not my daily driver

We bought It For my son as a project we got it running last weekend we were working on it this weekend it will run but it takes a bit to get it to run the it's like some one just turned off the key then it will not crank back up not sure what would make it do that

What carburetors are you running?

Will it start right back up?

How long does it run?

What ignition are you running?

Does it still have both fuel pumps?

 

I can't live that far away from you. I'm in NE Forsyth County, less than a mile from Lake Lanier.

ok the car is all stock

 

the carbs are off a 72-73

 

it runs for a min it or two then shuts off

 

ignition is stock as far as i can tell

 

both fuel pumps are in place but as of right now only running off the front pump

ignition is stock as far as i can tell

 

Look under the distributor cap and describe what's there.  We can't tell what " as far as I can tell" means.

 

 will not crank back up not sure what would make it do that

How long is "will not crank back up"?  Seems tedious but the words are all we have.  Make them count.

Ok sorry it has a electronic ignition

It Will Have to sit 5-10 minutes before restart

I won't be surprised if it's not a fuel delivery issue. I'll see if I can visit the car in person (in auto?) and verify.

If you could come by and take a look

That would be great just let me know and we can make it happen

Thanks guys for all the help

You can bypass the gas tank with a gas can.  Run a hose from the gas can to the "IN" nipple of the pump, then run a smaller hose from the fuel rail's return line into the gas can.  A 2.5 gallon plastic can fits perfect in between the radiator and grill on my 240.  Or when it won't restart, pull the supply hose off and blow into it until you hear gurgling from the tank.  I'll show you what was causing mine to quit after a few minutes then restart after all the crud settled.  Not rust, it wouldn't stick to a magnet, just crud that would crumble like dirt in my fingers.

 

 

 

Wow that is a lot of crud

As of right now we are running rebuilt bell top carbs new fuel pump and new lines running off a clean gas can we took the tank out to have it cleaned out waiting for it to get back then we will run new lines though out