I have a 1990 buick century with a delco radio and I cant figure out how to change the time on the radio.

Usually on older AC-Delco/Remy Radio, press the "set" button and it will take you back to the radio station frequency, then push the left knob inward, then it will take you back to the time again. Before the "set" mode ceases, use the seek and scan buttons to change the minute and hour for the time, until you get to the time you want

Have you checked fuses/power coming to the device?

The Delco antenna has a plastic cord that raises and lowers the mast. If it breaks, the motor continues to run. Repair parts are getting harder to find and salvage yard antenna have the same problem. I rebuild Delco antenna

Have you checked base fuel pressure with a gauge ?
Have you figured out if you are loosing spark or fuel when the engine dies ?

Check the EGR and if it is bad then replace with authentic AC Delco OEM part because the aftermarket ones have weak springs in them.

antenna operation happens when radio is turned on,so I would look at the radio fuse first,other than that look for ant. fuse

remove coins from the cigarette lighter or unplug it. Never put a bigger fuse in than what it calls for tha is a BIG mistake.

Your turn signal flasher should be located under the dash on just to the right hand side of the steering column. It we most likely be a round little can shaped object

There is a single screw located inside the glove box (on the left side) that needs to be removed. Then just carefully pull out the plastic dash as it is only secured by pushpins. Then remove the 2 screws holding the radio, and unplug the antenna and wiring harness, and it's out.

wow lot of work ,,normally just two holes either side or radio and push in a special tool and they pop out