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  1. Focus ST Discussions
    I’ve been having a weird rpm surging issue. It only happens at about 1/2-3/4 throttle from 2400rpm and goes away past 4000ish rpm’s. On WOT throttle from any RPM it doesn’t occur. I’ve tried to look through logs and nothing seems to be off or different. I’ve dug through as many threads as...
  2. Focus ST Discussions
    So I recently bought a turbosmart BOV and when I was finished installing it and looking for the vacuum line I realized that it already had a tial blow of valve. I bought the car and I never really knew what it had until I started looking around. So my question is can I run them both or do I...
  3. Focus ST Discussions
    Hey I have a 13 fost, full bolt on , solid motor mounts & stratified crackle tune, stock bov. let’s start off with my car has a slight exhaust leak this might be major but I’m trying to make sure, I usually hit peak boost at around 22-23psi in 3rd & up, now recently I noticed I’m peaking right...
  4. Focus ST Discussions
    I revved my car today & I looked at my ap & my cyl 4 was at -0.50.. I reset it , did it again a few hours later & same exact thing ! & I did it another time & it was good , but I’m sure it will do it again. any suggestions ?! Thanks. mishimoto fmic Catback exhaust Cpe intake Cobb ots stage 1 tune.
  5. Focus ST Discussions
    So I'm going to start off with that I'm only getting it on cylinder 4, Cars full stage 3 and it has only started happening when i installed my front mount intercooler. My OAR Stays constant at -1.00 both my tuners say it could be a little noise I'm just posting this to see if anyone else had...
  6. Focus ST Performance
    So a couple months ago i bought my 2014 focus st with 51k on it. all it ever had was a front splitter, wing risers and symposer delete. (so i thought). fast forward to now with about 55.7k on it i’ve came the realization that it previously ran the FRPP tune bc i bought a front intake snorkel and...
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