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My 940 turbo died on the highway, sputtering stop. After waiting a few minutes it would start again and run for a few minutes. Had it towed to a shop that replaced both pumps. Worked fine after that.
Four months later it happened again. Found that if I waited 5-10 minutes, it would start fine and run for 1-3 miles before dieing. I replaced the fuel filter. Worked fine after that.
A week later it started doing it again. I installed a back-up fuel pump relay. No difference. I jumped the radio suppression relay. No difference. I checked the fuel pressure at the rail. It went up to 35 psi then it started coming back down and settled at 20 psi. So can it be the fuel pressure regulator? What else can I do but replace it?
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