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1994 ford t-bird w vin code with a 4.6l and codes p1132 p1138 p1152 p1158 and a p0300 it has 145k on it and need some help have changed the plugs and checked coils wires they're ok so what is next?
Wiki User
∙ 17y ago
http://autorepair.about.com/cs/troubleshooting/l/bl_obd_11.htm The first 4 are related to a rich condition from the oxygen sensors. If they are reasonable in cost, fo all of them. Not uncommon to replace one and then have the other prove bad. The front sensor and the back sensor compare values. IF both have benn slowly going bad, there values would be comparable but not bad enough to fail. When one goes bad; out of spec, it will throw a code (s). It is replaced with a good one with a perfect value. When the new one with perfect value compares to the old one of poor value, the weak older one throws a flag for the computer to throw the check engine light again usually. IT may place a code but not throw the check engine light as well. The po300 is a random misfire code the is probably because the oxygen sensors are telling the computer false data about needing more fuel and the computer richens up the mixure enough to foul out plugs at various times. This will also cause poor fuel economy.
Wiki User
∙ 17y ago
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vacum leak
