I have a 1994 sentra LE with 1.6 engine. I too have had some difficulty with the "advanced timing" instructions given on this site. While the engine seems to run fine, the second i disconnect the TPS plug, the engine will not idle. it will start, but dies, making it impossible to time. I did it without unpluging, noting that it seemed to read correctly on the standard setting. Is this typical for this year? the instuctions on the technical section make reference to 1995 models, and they "assume" it is similar for other models. Anyone else have this problem? According to my manual, all voltages on the plug are correct.