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My 2000 durango 4.7 keeps throwing cod p0149. when i drive it down the highway it is fine but around town the check engine light comes on and it starts idling way rough and blowns heavy bleck smoke out the tail pipe it also has a kind of sulferic smell. but once it cools off and i reset the light it goes away. the shop just replaced the o2 sensors plugs and air filter. what else could be causing my problem. every once and awhile it also shows a code refering to vacume leak or fuel problem

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Posted on Jan 02, 2017

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the exhaust may have a blockage in it....maybe the cat converter....motors don't have power unless they can get rid of the exhaust.....

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Check the fuel filter, it might be clogged.

Posted on Jun 15, 2009

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SOURCE: 1998 Jeep Grand Cherokee Laredo 4.0 6cyl, when i

Have you checked the coolant temp sensor. They also have something called a MAP(manifold absolute pressure) sensor that could be causing this issue. This sensor will have a 4 pin connector and 1 vacuum line going to it. Should be on the firewall, just behind the engine.

Posted on Feb 22, 2010

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SOURCE: what causes 2000 taurus engine rough idle but no codes

remove neg. cable from battery so the ECM will reset this may work. make sure the IAC is air tight. if this doen't fix your problem have someone check the IAC valve if it's bad the part runs $300.00 pluse

Posted on Nov 25, 2011

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