Cranks fast and doesn’t start for a minu

[Bib36`]

My mustang crank really fast and not start for a long time (15 sec-30 sec), then start. When the gas tank is full it doesn’t do it, but when it gets close to half tank it happens. Not all the time but often.

 

[Noobz347]

How many miles do you have on the fuel pump?

You have a late model car. Post up the year and post up ECU codes (pull them if you haven't).

 

[fasterthangas]

Fast cranking is usually a sign of low compression. Hmmm....