87 300zx torbo straight shift that wont shift when started

When bleeding the slave cylinder does the fluid shoot out with a good bit of pressure? (After pumping and holding clutch pedal to floor) if not could be a master cylinder issue. If it does shoot out continue bleeding and keep adding fluid. Make sure fluid never gets to low or more air will enter system. Also watch the shaft coming out of slave cylinder. Is it fully extending? If not may still have air in system or master cylinder is failing.

With the maf sensor check the electrical connections. These cars are known for corrosion build up in the electrical connections in the engine compartment. Unplug and plug the connection several times. Also adding a little bulb grease to connection often helps.