How accurate is the AP when reading boost?

I'm reaching out to y'all to try and find solutions or advice on my issue. Let me explain and I'll post a data log as well. For starters, I have a 2016 FOST (FBO by JST). I've recently noticed a slight lack of boost and only hitting around 19.5 - 20.5 when I used to hit 21-22 before. I...

Hello I was wondering if someone could help me. I have a 2008 focusST the facelift. With the start stop. i have it running on the cp plug in 340 map I have abit of lag. Like 4th and 5th mainly. A big flat spot. really annoying lol Is there anything I can do to help prevent this? thank you

Hello, First time user of this forum. I did a ton of searching on this issue and I cant seem to find anything similar. I bought my 16 ST3 recently and the check engine light came on for both p0234 and p0299. over boost and under boost. I checked all the intake piping and vacuum lines going to...

Boost build up to about 8-10 psi then starts breaking up car bogs down can’t go over 50mph when using boost, Boost between then is fine. mods list Awe track exhaust Megan racing catless DP K&N high airflow filter Ngk 6510 plugs. ( installed today gapped at .026) Turbosmart blow off (installed 2...

Hey there! First post here. I have a 2017 focus st. Two nights ago I put on a blowoff valve (turbosmart) drove that night worked fine. Drove the next day all was fine then. Drove this morning still fine. Went for a drive again today (first time on a highway, but not my first time getting to...

I just bought a 2016 ford focus st. I am already having issues with it. It seems that my ECU can’t match the amount of boost i’m pushing. Very weird noise when I hit boost and my BOV isn’t going off correctly. The car when you let off the gas throws you forward kind of. I am running very rich...

So I’ve had my 2018 Focus st for about a month now I have the mishimoto universal inter cooler, green filter, after market BOV and mbrp exhaust. I’m remote pro tuned by sneekytuned the man is a genius. I live in Florida so it gets pretty hot during the day and I’ve heard that you can lose boost...

I’m about to bring it back in for the third time. I bought it certified pre owned with 10k on it and now has 15k. Here’s my issue. The car falls into some type of boost limp mode when it’s wot in the higher gears. I can drive around while full boosting between 1-3 gear and it has no issues...

Hey everyone! The team here at Boost Therapy has a solid supply of "BOOST" turbo stickers. They make for pretty good quarter window decals on the ST seen below. If anyone's interested, they're only $5 using the link below. For any bagged ST's out there, we've got one for you too on the site ;)...