Question about 2003 Ford ZX2

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My 2003 Ford Escort ZX2 has a rough idle, runs great while driving, but tries to die and sometimes does at stops. I cleaned the MAF sensor, it seemed to help a little with the rough idle, could the MAF sensor still need to be replaced with a new sensor to fix it completely?

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Check your PCV valve or the PCV hose

Posted on Jan 01, 2015

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The fact you have pressure shows the need to clean your crankcase breather system as you have back pressure.

Posted on Dec 20, 2013

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2003 zx2,rough idle when stoped and the car in drive,runs fine on open road,while idleing i opened the hood,when i loosened the oil fill cap i heard a pufffff,like a relief valve,it should not be building pressure should it???dolfo52@comcast.net,please

Posted on Mar 04, 2011

  • ronhicks1979
    ronhicks1979 Jan 26, 2013

    No there is a PCV Valve that should relieve thee pressure. Buy and install a new one. easy to install and cheap to buy.https://www.google.com/search?hl=en&tbm=... parts code is PCV326

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