Question about 2003 Ford Expedition

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They said it was on o2 cencer now they say its the fuel filter!!!

When i turn on the espedition its like if i were pressing the accelerator on and off. when in driving is ok but when i come to a stop it kind of shakes and sometimes it even dyes whats wrong with it????its an 2003 it already hit the 100.000 miles

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If the 02 sensor is not functioning the onboard computer does not have the info needed to keep the fuel mixture regulated. It can be too lean or too rich at idle(usually too rich) This can cause the engine to idle roughly and even die. When you manually step on the accelerator you are increasing the air/fuel mixture and the engine runs better, however your fuel mileage is probably terrible. If the codes indicate an 02 sensor as the problem, I would replace it.

Posted on Jul 14, 2009

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Could be a couple of things. The sensors are a pain to troubleshoot. MAS/MAP or IAT sensor is a problem one also...it is the cheapest of the sensor.

Posted on Jul 14, 2009

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What is the drive cycle for a 1999 vw jetta


The drive cycle is as follows
For all OBD2 VW's

OBD-II Drive Cycle Stages
The OBD-II Drive Cycle is an eight-stage course, as illustrated in the
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Stage 5: Decelerate-Gradually coast down without applying the
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1 Answer

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2 Answers

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