1990 k1500

Asked by Brian Feb 05, 2018 at 05:53 PM about the 1990 Chevrolet C/K 1500 4WD

Question type: Maintenance & Repair

my truck runs ruff until i unplug the vacum line thr
big 1 on the back of the throttle body it dosnt cut
out but blows black smoke if i plug it in where its
supposed to be it idles for a second and shut off
and wont let me give it any fuel idk what it is

1 Answer
223,915

Rowefast answered 6 years ago

That hose runs the pcv valve system. Check the pcv. This is for crank case ventilation and needs to be hooked up.

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