Ford F-150 2015 5.0L - Fuel Pump Relay/Driver/Controller Replacement

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Fuel Pump Relay, which you can purchase here: https://ebay.us/v1au3L

I have a 2015 F-150 Lariat 5.0L that starts up and idles normally most of the time, then out of nowhere begins to run roughly with RPMs dropping and feeling like it's about to stall. Most of the time, the rough idle is nothing more than a rough idle, but occasionally the rough idle turns into a stall. This same low idle/near stall occurs at stoplights, waiting for turns, drive through, and sometimes driving under 5 mph. This rough idle/stall is inconsistent and unpredictable. Sometimes I can go for 2 days, hardly feeling the rough idle or experiencing any stalls. Sometimes it stalls twice in under a minute, like at a drive-through or a light. Sometimes it idles roughly before it stalls, and sometimes it stalls the moment the truck comes to a complete stop.

Of all the parts I changed to solve this issue, changing the Fuel Pump Relay seems to have fixed the problem. The rough idle is nearly nonexistent, and stalling is no longer an issue either. It has only been three days, but I do feel like the problem has been fixed. (Did not fix the ruff idle but the truck did perform much better and stalled much less.)

Note: When I first started up the truck (after unplugging the battery for 30 minutes so that the computer can restart the learning process) stalled twice within five minutes. Then I let it idle for 20 minutes. The engine ran smoothly during that time (No rough idle and no stalls). When I drove it home, it stalled once at the first traffic light, and after that, I didn't have any problems. My point is to give the truck time to learn, and if the rough idle and stalling continues after giving the truck 15-20 miles to learn, you have to continue looking for other causes.


Note: When I first started up the truck (after unplugging the battery for 30 minutes so that the computer can restart the learning process) stalled twice within five minutes. Then I let it idle for 20 minutes, the engine ran smoothly during that time (No rough idle and no stalls). When I drove it home it stalled once on the first traffic light and after that I didn't have any problems. My point is give the truck time to learn and if the rough idle and stalling does continue after giving the truck 15-20 miles to learn then you have to continue looking for other causes.