[Formulajones]

Maybe I missed it but you had 40 psi before and a new regulator gave you 8 more psi???

That's only 48 and these systems are designed to operate with a steady 60 psi so unless there is something I missed that you posted it still sounds like a weak pump.

After you get the pressure where it belongs it would be a good idea to clear the learn table and start over because that is definitely corrupted. Over time it may recorrect itself on its own but there isnt much sense in driving the car around with a skewed fuel table waiting for that to happen.