Before the car surged and bucked at low rpm cruising. It had a intermittent surging idle. It we generally hard to drive. I ensured all my sensors were good before going to the tuner. Now this was a while ago, so its tough to remember. He set timing and verfied fuel pressure. Asked about modifications, thermostat, and spark plugs. Everything checked out so he plugged in with his laptop. I would guess he could see all the data from sensors and verified they were working. He wasn't the most talkative guy about what exactly he was doing.. I chalked it up to working his magic. He is renounced as an excellent ford tuner in the northeast and one of the only that actually tunes these old cars. I know that he changed the timing curve and fuel table, but not what else. For reference I had edlebrock heads and intake, unknown cam, 30lb injectors, and a
BBK fenderwell CAI and matching MAF. First pull was 250hp and the last was 299hp. I also talked to him quite a bit about further modifications, what he's seen work well, how to make more power, and other general mustang stuff. Money well spend for me.