Question about 2000 Ford Focus
My car will stutter and judder when i accelerate and the speedometer jumps when this happens.
Take your vehicle to autozone, advance auto or orielly's and have them hook it up to their diagnostic tester. Free service by all. Sounds like a sensor is bad or you have moisture in distributor; or your control module is shorting out. You didn't mention type of auto. GM's have electronic control modules under coil pack depending on year. Others like ford have mass airflow sensors to control this along with a module. Best to take to one of the autoparts stores I recommended and have it hooked up.
Posted on Jan 17, 2013
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Posted on Jan 02, 2017
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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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