- First Name
- Mathieu
- Joined
- Mar 27, 2022
- Threads
- 2
- Messages
- 124
- Reaction score
- 371
- Location
- Orange Park, FL
- Vehicle(s)
- 2021 F-150 PowerBoost
- Your Bronco Model
- Base
- Thread starter
- #1
Greeting fellow Bronconians. I have an issue on my 22MY Bronco and I'm hoping someone can shed some light into it. 2 Dealership visits and no resolution because of the whole "we can't duplicate the issue" and no DTC's / Fault codes are being generated. Now onto the situation.
This has happened a few times now. I'll come to a stop and auto start/stop will activate like normal. However, when I let off the brake to start start driving again, instead of the engine cranking back over, we'll hear a loud high pitch whine and then the engine just shuts off. The instrument panel will tell us to change gears from D > P > push start and then back to D and I'm on my merry way. I recently had the alternator replaced by Ford under the water logging TSB. Alternator is pushing out a stead 14+ volts. I had Ford test our battery and they said the battery tested fine, but did need a charge, so they charged it and put it back in. Last night, the Bronco died again with my wife and kid on the road this time. Also a few nights ago, the wife was at her mothers house and when leaving it wouldn't crank. We contacted Ford Roadside for a tow, but my FIL "Father in Law" was able to jump her off so we could get it home.
1. I have been putting it off, but I am going to disable the auto start/stop. That seems to be the culprit but what exactly is making it malfunction and why aren't any troubleshooting codes being registered.
2 . I hooked up FS while driving the kid to school today to monitor battery activity and noticed that while driving, the battery current is reading 0 amps but is between 13-14V. When auto stop/start kicks on, battery amps go high because its cranking and then falls back down to 0. Is that normal? Ford said the battery was good but I'm wondering if they only checked the voltage. I'm also seeing that the battery state charge is 80-81%.
This is driving us bananas. Any insight would be appreciated.
This has happened a few times now. I'll come to a stop and auto start/stop will activate like normal. However, when I let off the brake to start start driving again, instead of the engine cranking back over, we'll hear a loud high pitch whine and then the engine just shuts off. The instrument panel will tell us to change gears from D > P > push start and then back to D and I'm on my merry way. I recently had the alternator replaced by Ford under the water logging TSB. Alternator is pushing out a stead 14+ volts. I had Ford test our battery and they said the battery tested fine, but did need a charge, so they charged it and put it back in. Last night, the Bronco died again with my wife and kid on the road this time. Also a few nights ago, the wife was at her mothers house and when leaving it wouldn't crank. We contacted Ford Roadside for a tow, but my FIL "Father in Law" was able to jump her off so we could get it home.
1. I have been putting it off, but I am going to disable the auto start/stop. That seems to be the culprit but what exactly is making it malfunction and why aren't any troubleshooting codes being registered.
2 . I hooked up FS while driving the kid to school today to monitor battery activity and noticed that while driving, the battery current is reading 0 amps but is between 13-14V. When auto stop/start kicks on, battery amps go high because its cranking and then falls back down to 0. Is that normal? Ford said the battery was good but I'm wondering if they only checked the voltage. I'm also seeing that the battery state charge is 80-81%.
This is driving us bananas. Any insight would be appreciated.
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