Idle problems - Won’t stay running

[cars.r.torture]

What’s up guys. So, today I bought a 1984 720. It was doing great all day. I had stopped in a parking lot to show it off to some buddies, but when I went to leave it had trouble starting. I had to give it gas to get it started which I never had to do before. As soon as I let off the gas the truck will die. Any idea? My guess is something fuel/carb related. I am very new to Nissans/Datsuns considering I only got it today. Truck has 90,700 miles if that helps at all. Thanks!

[DwayneOxford]

Sounds like the idle fuel shut off solenoid lost power. Search this forum and learn.

[datzenmike]

Have someone turn the ignition to the on position (not start) the off and repeat several times while you listen near the carburetor. What you should hear is a soft clicking sound. Does it?

 

Was it very hot out????

[Justin]

A stretched chain can lead to incorrect timing which creates many other problems you normally wouldn't have to deal with.

 

Check it with a timing light.

 

Then you can move your sprockets like ol' Mikey sez.

Edited June 15, 2023 by Justin

[datzenmike]

If it was running that day and then not running later I doubt the chain stretched in between. Never seen a stretched chain and there is a provision on L cam sprockets to adjust the cam timing to compensate for any wear.

[Thomas Perkins]

Maybe clogged fuel filter or weak fuel pump.Take fuel line off at carb,put into a Mason jar and turn over and see if gas comes out real strong.Check for fuel leaks at fuel pump.