What would cause the vehicle to not start after unplugging the MAF sensor? on 1993 Toyota 4Runner

I unscrewed the 2 phillips screws on each side of the pin connector on top of the air box enclosure. I pulled the connector out slightly and then plugged it back in and also re-installed the screws as well. I removed the air box and the air hoses and then inspected the air filter. Everything looked fine. I put everything back. Now the vehicle cranks, but won't start. Why?

Asked by for the 1993 Toyota 4Runner
recheck your work again