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cylinder 4

  1. Focus ST Discussions
    Had a misfire on cylinder 4 after some high rpm 2 stepping, compression is around 32 while all others are at a normal 155 reading, there’s no smoke but there is some oil on top of the piston and the tip of the spark plug, and my valve cover gasket is fine so it makes me believe my valve seals...
  2. Focus ST Maintenance
    Hey guys, So my 2014 Focus ST started having a misfire in cylinder 4 this morning. On my way to work I noticed a slight unusual gurgle at low RPM, didn't think much of it other than I need to keep an eye on that and see if that continues. I got back in the car later and on my way home it...