Hey guys, 86 2.5L Renix 5spd. The truck has a rough idle, putters when accelerating but occasionally jumps back into normal operation and then putters again. At higher rpms it seems to be ok, but definitely feels sluggish. I changed the fuel filter just as a starting point but little to no difference. I just bought it in July and the guy said he had just changed plugs, wires, and distributor(and had a 14 year long log of all work done to it with receipts, so I trust it). Any suggestions on where to start looking first?