1987 ford f150 starting problem
 

I have a truck that runs but dont start. the starter seems like it doesnt have enough power to turn the engine it has a good battery in it new wires new solenoid its been haveing this problem fo a while the owner replaced the starter and it worked and then stoped working same with all the new parts is it a bad conection or is it the tfi if it has one or the computer. any ideas or you think it is just dieing from the baterry but i dont understand why it wouldnt crank over if it had a new batery?

Thanks Tom

You changed the battery cables? All three?

yeah all 3

thats what the guy thought so he replaced the wires solenoid and starter the engine runs if you push it and pop the clutch and stays running problem is cant start it back up