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Year: 2008 Make: Mazda Model: speed3 Mileage: 140,000 Location: WA Concern: I have noticed a stutter or rough idle that just started… when it happens feel like a misfire but my afr jumps to 15.2 and then go back until it happens again open loop seems to run fine but as soon as it’s in closed...

I have a newer clutch probably 3k on it maybe 5k miles. And it’s slipping as soon as I go into fourth gear sometimes at peak boost it 3rd. I was curious it a bad check valve could cause pressure in the hydraulic system of the clutch or are those 2 systems separate from each other? Sent from...