Julian0476 Posted March 17 Share Posted March 17 My ford focus st line 1.0 ecoboost seems to be idling roughly obviously the engine is shaking slightly, an also it only revs up to around 4000. Has anyone had this problem before an whats the possible causes of this? 1 Quote Link to comment Share on other sites More sharing options...
unofix Posted March 17 Share Posted March 17 Is this a new problem ? Most 1.0 ecoboost seem to idle rough from the many comments posted on the forum. Quote Link to comment Share on other sites More sharing options...
Julian0476 Posted March 17 Author Share Posted March 17 I know 3 cylinder engines are not so smooth at idling, but it's a rough idle an won't rev over 4000 just shakes when those revs are reached Quote Link to comment Share on other sites More sharing options...
Foxxyblieu9 Posted March 17 Share Posted March 17 Is it a Mk3 or Mk4 2018? I’ve been in a few 1.0’s and they all sound wrong at idle you think it’s misfiring 😂 will it pass 4000 when driving? Could just be a soft limiter, does it seem down on power? Quote Link to comment Share on other sites More sharing options...
Julian0476 Posted March 18 Author Share Posted March 18 10 hours ago, Foxxyblieu9 said: Is it a Mk3 or Mk4 2018? I’ve been in a few 1.0’s and they all sound wrong at idle you think it’s misfiring 😂 will it pass 4000 when driving? Could just be a soft limiter, does it seem down on power? It's a mk3 2018 I'll put it on a scanner later even though it dont have any light on, don't think it misfiring as it drives fine not sure if it will pass 4000 when driving I don't really boot it tbh Quote Link to comment Share on other sites More sharing options...
Julian0476 Posted March 18 Author Share Posted March 18 11 hours ago, Foxxyblieu9 said: Is it a Mk3 or Mk4 2018? I’ve been in a few 1.0’s and they all sound wrong at idle you think it’s misfiring 😂 will it pass 4000 when driving? Could just be a soft limiter, does it seem down on power? Just took it for a drive an it does go over 4000 when driven, Quote Link to comment Share on other sites More sharing options...
Don MC Posted March 18 Share Posted March 18 Could the rough idle perhaps be the cylinder deactivation function kicking in? My 2022 Focus sometimes idles a little rough (when warm) and I assume it’s because of this. Quote Link to comment Share on other sites More sharing options...
Tizer Posted March 18 Share Posted March 18 8 minutes ago, Don MC said: Could the rough idle perhaps be the cylinder deactivation function kicking in? My 2022 Focus sometimes idles a little rough (when warm) and I assume it’s because of this. Cylinder Deactivation does not happen at Idle. 1 1 Quote Link to comment Share on other sites More sharing options...
unofix Posted March 18 Share Posted March 18 1 minute ago, Tizer said: Cylinder Deactivation does not happen at Idle. You beat me to it 🤣 I was just about to say that. 1 Quote Link to comment Share on other sites More sharing options...
Don MC Posted March 18 Share Posted March 18 OK. Then it was something else I was experiencing. To be precise, it has happened only once for me. Warm engine, below freezing weather. Parked with engine on. Quote Link to comment Share on other sites More sharing options...
Foxxyblieu9 Posted Friday at 10:23 PM Share Posted Friday at 10:23 PM On 3/18/2023 at 10:55 AM, Julian0476 said: Just took it for a drive an it does go over 4000 when driven, And it doesn’t feel like a lack of power? I’d say it’s probably just a soft limiter Quote Link to comment Share on other sites More sharing options...
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