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Hesitation and Black Smoke???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazen_md, Apr 13, 2002.

  1. blazen_md

    blazen_md 1/2 ton status

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    I have a 1990 K5 with a 350 tbi and I put a new oxygen sensor and trottle body gasket on today. Well I put the sensor in and now when I start it up it hesitates and blows out black smoke and my service engine light stays on. Its almost like it is getting too much fuel. Just wondering if any of u guys have came across this problem.
     
  2. denver75k5

    denver75k5 1/2 ton status

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    Location:
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    Did it do that before you put the new O2 & gasket in?, Mabey find someone with a tester and see what trouble code is popping up...
     

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