1992 240 SX, 278,000 miles on original engine. Had spark plugs,distributor cap, fuel filter, and plugs replaced and something about the (1)injection I think that's what it is called. I think there are 4 or more of them on the opposite side of the sparks plugs. When the mechanic pulled the plug you could tell it needed replaced.Before I had all this done the engine was running rough and I was staling our everywhere. Runs allot better now but stales out when starting then I have to give it more gas, or if I turn sharply and quickly

I would have the Idle Air Control Valve tested and either cleaned or replaced as necessary. Regardless, more diagnosis is needed to determine exactly what needs to be done next.
If you need someone to help with the diagnosis, check the IATN shop finder by visiting Auto Repair Shops - iATN Member Directory (http://autorepair.iatn.net/member-directory)
Go to the "Find a Repair Shop" and put in your ZIP and select your search radius. Once you've found a shop, simply call them and describe your problem to see if they can actually help you. If that shop cannot, they may be able to point you in the right direction.