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  1. Focus ST Maintenance
    I'm completely lost when it comes to spark plugs. I've compared some pictures on here to my plugs and I'm unsure. I'm thinking hot/lean. Just wanted some other st's owners input. Car has no tune, just aftermarket bov, short shift, and use 93 octane gas all the time. It's a daily driver, 98% is...
  2. Focus ST Maintenance
    Hello all, about 3 months ago after an hour long highway drive I got a P2096 and P219A code come up in my 2014 ST with 84k miles and the extended warranty. (I should mention this car was built on 9/14 which I believe makes me exempt from the TSB about oil migrating from VVT solenoids to CMS. I...
  3. Data Logs
    I was on a tune made for me when suddenly my LTFTs started really acting up, tuner placed my car on a base map to see what’s going on and We see no symptoms of vacuum leaks on any logs. Can anybody recommend what to run down through? Parts - Air filter, whoosh intercooler, 50/50 Turbosmart...
  4. Focus ST Discussions
    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...
  5. Focus ST Maintenance
    Long-ish Read - Had to clip my fingernails before writing this one. Once I finish writing it, I'll probably need to clip them again. Enjoy this sloppy little outline of the swap I've been doing since the beginning of June! I'll try using paragraph form so this is a bit easier to navigate. Be...
  6. Focus ST Discussions
    Hey everyone, so as I was driving to work yesterday my car started to misfire under light acceleration. I drove it easy then I did a pull in 3rd gear to see if it cleared up. The misfire continued and at about 5k RPM the car would not accelerate anymore and it sounded like launch control sounds...
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