Hello , i have a problem with my 1996 ford ranger 2.3 standard. we got this truck from a guy that said the timing slipped or belt broke, he tore it down and the belt was not broke, but worn some, he put a new belt on it and he put it back together and it wasnt in time, so he tryed starting it and it woulnt hardly run or have any power, so he tore it back down and he broke the harmonic balancer, so we got the truck tore down , we bought a harmonic balancer from salvage yard , put it on , timed it up ( we think) and it will start , but sometimes it dont want to idle and some times it idles good for a few seconds , no power , it kinda chugs and kinda pops when you try to drive it , but no power, we had a mini computer put on it it says codes 1131 and 1116 we are at out wits end trying to figure out whats wrong , ppl say cam shaft sensor , some say crankshaft sensor, dead plugs , coil. can someone please help with this headache???