Ford Focus Forum, Ford Focus ST Forum - View Single Post - ZETEC Engine stumble - SOLVED
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Old 03-30-2009, 08:53 AM   #145
bugfanatic
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Join Date: Sep 2007
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Location: Michigan, MI
What I Drive: 2003 Charcoal Grey ZTW

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I too had the vibration & replaced each motor mount & didn't get any improvement until the passenger side mount was changed. I found out by chance that pushing down firmly on the top of the passenger mount will greatly increase the noise if it's a bad mount & help you pinpoint the problem. I also had a bad idle problem which was compounding the vibration issue so I ended up cleaning my MAF sensor with alcohol, fixing the kinked PCV hose on the backside of the motor, replacing the PCV valve, & replacing the upstream O2 sensor per engine code it kicked out while I was doing the motor mounts - what perfect timing on the 02 code, huh?
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