I have 1990 Honda accord LX 165,000 miles. I changed plugs, wires, valve cover gasket and cylinder seals, cause oil was getting in, and then i changed fuel filter. Car starts up fine, then when i put it into gear it runs until i slow down, it starts to miss then sputters and eventually dies but when i drive fast it runs fine until i slow down again PLEASE HELP its the only car I have!!!