My truck sat up all winter. It cranked up and idled up and down until it stopped. I gave it gas, put in first gear and it bogged down almost to a stop...then lurches forward?? When I give it 1/4 pedal it races up and down. I get ready to go on and it bogs down until I get up to speed then it still doesn't run smoothly like it has in past years I have no clue as to what is wrong. I am afraid to try to hook up my trailer for I don't feel it has power? Once it reeves up and I really put the gas pedal down, it gets up to speed ?? My tank is about 1/2 to 3/4 full of gas. Thank you for anyone with ideas!!