Question about 2003 Ford Focus
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Posted on Jan 02, 2017
SOURCE: ford escort cab
It may either be the PCV Valve or a vacuum hose leak. My problem was the vacuum hose. You will have to know if you have a 1.8 or a 1.9 engine when you order the PCV valve. It is a really cheap part ($2 or so).
Posted on Jul 16, 2008
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Dec 19, 2013 | Cars & Trucks
Aug 13, 2017 | 2005 Ford Focus
The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.
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