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Old 05-02-2005, 11:40 PM
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ModMech ModMech is offline
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Re: 87 efi 300 l6 4.9l runs fine the black smoke comes out the tailpipe???

Yup, it sure could be the fuel regulator, or a bad coolant temp sensor, vacuum line to the BARO sensor, leaking (bad) injector, or a bad EEC.

Usually with black smoke, it is something obvious and simple.
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