Car keep cutting off while I'm driving

Take it back to whomever tuned it up.

I did and nothing is wrong with the plugs and wires it just stops but cuts back on easily

How is the fuel pressure?

I have 2003 LeSabre 3800 engine - stalling problems with the 3800 tied to crankshaft position sensors. Known issue, service techs need to use the internet.

This is the issue with these models. But u dont know. Its so many things that can cause itvto stall. U end up changing everything before u find out it was the crankshaft sensor