Question about 1998 Ford Taurus
No that is it, More then likely your 02 sensor needs to be replaced.
But other possible causes would be excessive fuel pressure, leaking/contaminated fuel injectors, leaking pressure regulator, low fuel pressure or running out of fuel, vapor recovery system.
Other possible causes could be: Air leaks after the MAF, vacuum leaks.
Possible causes PVC system:
improperly seated engine oil dip-stick.
Possible causes EGR system:
Leaking gasket, stuck EGR valve, leaking diaphragm or EVR.
Possible causes Base engine:
Oil over filled, cam timing, cylinder compression, exhaust leaks before or near H02S(s).
I know its a lot of info but it could be anything. Take your time, good luck. Let me know how it is going.
Posted on Apr 27, 2010
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Posted on Jan 02, 2017
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