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So recently my 16’ fost has developed an issue where in 1st and second gear it feels like it’s stuttering or just bumpy. It’s only when first starting out in those gears tho I thought maybe clutch but the rpm does not shoot up, although if wot it will for a second in higher rpm but once again only in 1st and 2nd gear. Any ideas?
 

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2018 Ford Focus ST1
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tuned? Mods? How old are plugs, and/or proper gap for them? How many miles?
 

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2018 Ford Focus ST1
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Any codes at all? Have you contacted Stratified and had them look at any data logs? Have you taken any logs? If so, post 'em up. A data log of 1st-3rd may be helpful.
 

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Mine was a tiiiiiiny leak past the throttle body. Not enough to throw a code but enough to make her unhappy.

Sent from my IN2020 using Tapatalk
 

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2018 Ford Focus ST1
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No codes but I will be contacting stratified today thank you!
Any anomolies with what your boost pressure is doing? Is it maxing out at the same boost pressure as it did before it starting having this problem?
 

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So recently my 16’ fost has developed an issue where in 1st and second gear it feels like it’s stuttering or just bumpy. It’s only when first starting out in those gears tho I thought maybe clutch but the rpm does not shoot up, although if wot it will for a second in higher rpm but once again only in 1st and 2nd gear. Any ideas?
mine does it when its cold once its warm goes away.
 
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