just as an update, I have just had a similar issue and mines manual now, no lights or anything and I swapped my fuel pump out for a walboro prolyl 2 months ago,i chages this issue down to a vacuum leak, it was intermittent I literally pulled over on the way to work and searched roadside for it while it was doing it, the vacuum leak was the tcl solenoid, it works fine and tests fine until it gets hot then it holds open, so maybe have a look at the tcl solenoid or the next time its doing it just plug the hole on the vent for the tcl solenoid, not sure if this will help you but I thought it might be worth noting.