2003 Mercury Sable ENGINE STALLING AFTER RESTARTING WITH EN

IF they charged you and did not test drive during likely conditions if they were instructed to do so, then you have a good gripe.

On the shop's defense of strategy, not the charges if any, they are trying to nail down the problem in the most likley situation from their perspective of experience, facts and troubleshooting data. When you have an intermtitant problem that is as infrequent as yours, another strategy may be needed.

Process of elimination for what facts we have.

Low fuel or no fuel.
Have you done this? What the specification of low fuel is, I'm not sure. I'll see what I can find.

High pressure or low pressure can ONLY be determined by catching the problem with the fuel gauge on. You may need to buy a gauge (https://www.2carpros.com/store/index.php?main_page=product_info&cPath=10&products_id=16) and have them hook it up to the windshield or some way of viewing it while you drive it. Then you can tell if the pressure goes high or low. Just be sure to verify from a seller that it will work with your vehicle and that any adapters are included. If I had to put money down, I would be suspecting a pump that is losing pressure for that period of time.

The shop can check the resistance in the circuit.

The shop should have already looked at the sensor and evaluated it for damage and the harness as well...BE sure to ask them if they did. IF they didn't, have it looked at.

Switch gas stations and or go for a higher grade
check and replace fuel pressure regulator

((We had an 02 that did the same with the same code
it was the PCM needed to be updated

we had to reprogram the PCM to the latest calibration
at the dealer ))

mention that to you tech

Thanks for blasting me. That wasn't necessary to be so dramatic. I'm trying to work with you not against you.

Fuel pump failure can most certainly be over a period of time and intermitant. It may be weak giving fuel presure that is low but present. As opposed to a "no volume of fuel ", it can have a "low volume of fuel. Conversely the fuel pressure may be too high ( fuel pressure regulator)

I brought up the possible sources according to Mitchell One. Since this is intermittant and it is your problem you want help with, you need to decide which way to pick at it. I gave you ideas and my recommendation to catch it. Since this happens approximately once every 20 days, testing may not be so simple as one pinpoint test.

An PCM is a powertrain control module, AKA a computer.

The reprogramming of the computer with the latest and greatest software may certainly be the fix.

This fuel system system is a returnable system.

Therefore the FRP sensor is not in the tank.

BMRFIXIT stated to "Check" the regulator first, not replace it first.

I apologize for not providing any help in my first response.