i bought this truck from my step dad about 5 months ago. he was the first owner and never had any issues with it. However he did use it for hauling scrap metal and other strenuous jobs. it wasn't exactly taken care of in other words. when it wasn't working anymore is when he finally would do something with it. as long as it did his job it worked. Now since it has been in my posession i noticed a problem right away that has drove me ******* crazy. When the truck starts up first thing in the morning she purrs. drives fine for about 10 or so minutes and then it gets a little sluggish. as long as i'm giving it a good amount of gas it doesn't really faze me. So right away i gave it a full tune-up. plugs,wires,distributor cap,rotor,coil,oil change,fuel filter, and air filter. This helped very little, yes i had a bit more power because honestly that **** hadn't been changed in years. truck would still get a little sluggish. when i say sluggish i mean it jerks at certain points while going down the road. When i slow down it sometimes stalls, but guaranteed to sounds and feel like its going to. slow speeds the truck sounds sick. So i was told maybe my timing was off. I took it in and got the timing set. Once again helped a little. so next i was told change your iac valve and tps. both are brand new. this changed speed but not the overall performance of my truck. Now when the truck stalls, it takes anywhere from 2 minutes to an hour to start and the only way it will start is if you have the gas peddle mashed to the floor. I've cleaned the throttle body, i've also changed my fuel to a higher octane, and when i'm not able to do that i make sure i have something to put in my tank. i've done nothing but baby this truck and take care of it. it has a bit of miles on it. 250,000 miles but you can hear its strong it just has something getting in the way. I need to get this figured out. i'm tired of sinking money into it. i only paid $1500 for the truck and i've put $2500 worth of parts into it. not all from the same issue but alot of them. Please all suggestions are welcome. One last thing i don't know if it will help. The truck has been turning over really hard almost like the starter is going out, i had the starter tested and its fine. don't know if this will help.