What does it mean if oil is coming from the TBI?

1989 CHEVROLET VAN
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DCMEZA
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I'm asking for my husband who is with the truck now and trying to fix it?
Jun 27, 2012 at 6:30 PM
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RASMATAZ
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Have the positive crankcase ventilation system/intake manifold checked
Jun 27, 2012 at 7:35 PM