I have done a major tuneup, plugs, wires, distributor cap, rotor, injector cleaner, air filter. I did not change fuel filter or check fuel pump as I think that is not the problem, could be wrong. Still bogs down, it does not do it all the time, if I excelerate slowely the car does drive and I can get to the speed I want. What I need is what to do next as I work on old cars. I have been told that a sensor probably is not working and needs to be replaced. Can someone tell me which 1 to start with and other sensors and which are likely to go