72cut Posted July 28 Share Posted July 28 88 comanche 4.0 Nauseating black smoke coming out of exhaust. I mean this stuff is nauseating feel it in your head, sinuses, makes you gag. What are potential causes just put new fuel pump on Link to comment Share on other sites More sharing options...
Ωhm Posted July 28 Share Posted July 28 Can you check fuel pressure? Check vacuum hose between MAP and engine manifold. Link to comment Share on other sites More sharing options...
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