1999 Ford Ranger 2.5 will start but won't stay running?

I did a tuneup it was running rough now it starts right up but as soon as you let up on the gas the engine dies. or:I did a tuneup it was running roug

I did a tuneup it was running rough now it starts right up but as soon as you let up on the gas the engine dies.

or:I did a tuneup it was running rough now it starts right up but as soon as you let up on the gas the engine dies.

Tags:engine,