87 b2000 ruff idle

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87 b2000 ruff idle
boozeboss avatar
boozeboss
+1y
My truck idles very ruff whether in gear or not. Please help
chaserjohndoe avatar
chaserjohndoe
+1y
we need more info to be able to help. carb, fuel inj., auto?
Cusser avatar
Cusser
+1y
Could be vacuum leak or EGR valve not closing completely (stuck open or partially open).