Equus fuel pressure sensor issue

A defective fuel pressure sensor definitely could cause those issues. The engine stalling, rough idle, and jerking are classic signs of fuel delivery problems. The sensor tells the car's computer how much fuel pressure there is, and if it's sending bad info, the computer can't adjust the fuel mixture correctly. Have you checked the sensor's wiring and plug connection? A loose or corroded connection could be the culprit.

Thanks for the quick reply! When you say 'wiring and plug connection', what exactly should I be looking for? Is there a way to test it without special equipment?

By 'wiring and plug connection', I mean visually inspect the wires going to the fuel pressure sensor. Look for any obvious damage like cuts, frays, or melted insulation. Then, check the plug (the connector that snaps onto the sensor) for corrosion or bent pins. Unfortunately, to properly test the sensor and its wiring, you'd really need a multimeter to check for voltage and continuity. Given the symptoms, and without specialized tools, I would suggest taking it to a workshop.

Thanks, I appreciate the advice! It turned out the cable connection to the fuel pressure sensor was indeed defective, just like you suspected. Cost me 95€ to get it sorted at a workshop.