hard start AFTER warmed up

[mikez]

94 4.0 liter with A4LD 137,000. Just started doing this. When engine is cold it will start right up, actually faster than my new f150. Problem is once its warmed up and you shut truck off, getting gas for instance, it doesn't want to stay running once started back up. It will start up rev to around 2000 like normal then just shut off. If i give it gas it will stay running and after about 15 seconds it'll run fine. thanks for any info?????

 

[94 splash]

seems like you're throttle position sensor might be going bad