Ecoboost Performance Forum

Ecoboost Performance => Troubleshooting, Maintenance, TSB Articles => Troubleshooting => Topic started by: SHO n GO on January 02, 2021, 10:57:16 PM

Title: 13+ sho bov letting off durring light accel, heavy accel.
Post by: SHO n GO on January 02, 2021, 10:57:16 PM
Hey everyone, i have a 13 sho with a livernois tune, map sensor, and t stat that im hoping you can help me with. So ive noticed my bov letting off very frequently. So there are times under very had accel ill just hear it blowing past the bov like they are not holding. there are times where it doesn't and pulls fine. there are times ill be cruising down the highway and come to a slight incline and the bov will just keep going on off on off on off in like two second spurts and the car surges. Or when i want to go a few mph faster on flat road it will go on off on off under light accel. I was thinking they are just weak and could use replacement. Wanted to see what you all thought.
So far i have tried swapping between tunes ive tried 93 tune, 91 cold weather tune and putting it back to stock with stock map sensor and did a quick once over of vac lines. No changes in behavior between tunes. Let me know what you think. Thanks!

Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: Admin on January 02, 2021, 10:59:56 PM
Quote from: SHO n GO on January 02, 2021, 10:57:16 PM
Hey everyone, i have a 13 sho with a livernois tune, map sensor, and t stat that im hoping you can help me with. So ive noticed my bov letting off very frequently. So there are times under very had accel ill just hear it blowing past the bov like they are not holding. there are times where it doesn't and pulls fine. there are times ill be cruising down the highway and come to a slight incline and the bov will just keep going on off on off on off in like two second spurts and the car surges. Or when i want to go a few mph faster on flat road it will go on off on off under light accel. I was thinking they are just weak and could use replacement. Wanted to see what you all thought.
So far i have tried swapping between tunes ive tried 93 tune, 91 cold weather tune and putting it back to stock with stock map sensor and did a quick once over of vac lines. No changes in behavior between tunes. Let me know what you think. Thanks!
I had the EXACT same problem. I replaced the Boost Control Solenoid and it was fixed.

The BCS sits on the top of the engine where the the vacuum lines connect too. Takes 2 minutes to swap out. I did it in the dealer parking lot with a pair of pliers.
Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: Admin on January 02, 2021, 11:01:35 PM
BL3Z-9K378-A

Part number for reference.
Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: SHO n GO on January 03, 2021, 05:49:52 AM
Awesome, ill start there and will update. Thank you!
Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: SHO n GO on January 13, 2021, 09:25:08 PM
Tossed in that part and still doing it. Going to recheck the hoses going to it for cracks and try to reflash the tune.
Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: SHOdded on January 14, 2021, 01:42:35 PM
codes checked? hoses secured to the solenoid? check bovs for weak springs/torn diaphragms.  check turbos for weak c-clips.
Title: Re: 13+ sho bov letting off durring light accel, heavy accel.
Post by: SHO n GO on January 15, 2021, 06:18:39 AM
Yes codes checked, only the pesky license plate one is there. Hoses were secured when installed. Going to follow them and check for any cracks and inspect bov's this weekend. Did not know about c clips on the turbos. Ill search the forum for info on those and inspect. Thank you!
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