Getting no boost past 6 psi

[Norcofox]

Hi Guys,

I've got a 2014 Fiesta ST and i've noticed a drop in performance recently and fluctuating boost levels. I used Torque pro to monitor boost levels and it seems on WOT I can't get anymore than around 6 psi. It pulls good down low in the rev range but when I get past 3500-4000rpm it falls flat on it's face.

I've checked all 11 boost clamps and they are all tight and snug. I've also checked for vacuum leaks using a propane torch and found nothing at all and I also have no check engine lights.

Could it possibly be a bad boost control solenoid and the 6 psi i'm getting is just waste gate pressure?

 

[MoxBoost]

Sounds like the boost solenoid. SiCo-developments has them in stock


Sent from my iPhone using Tapatalk

 

[SlowDunny]

Have you tried to reset the ECU?

I had the same thing happen to me a few months ago, so I reloaded my stage 1 map and it made everything better.

Disconnecting the battery may do the same but I used my Accessport.

 

[brbauer2]

Check to make sure you aren't on an Eco Tune Slot on the Accessport.

 

[Norcofox]

Yeah i've reset my ECU and reflashed my mountune mp215 tune and it didn't make a difference and I dont believe I have an eco tune available to select anyway.