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Old 05-14-2007, 09:43 AM
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'88 mustang

88 mustang 2.3 auto runs rich, under about 60 mph, smokes like hell, rides jerky, when doin' 60 mph + it runs like new. replaced 02 sensor, injectors,egr and distributer ,no check engine light, rann diagnotstics test and no codes came up. what is wrong with it??? please reply.

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Old 05-17-2007, 12:42 PM
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A friend of mine had a 280Z years ago that acted something like that. Ran great at high rpm at full throttle, missed and smoked any other time. Turned out to be the electrical connector at the coolant temperature sensor was not making a good connection, causing the computer to think the motor was really cold. I guess a bad sensor would do the same thing. Might look in that direction if you haven't already.
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