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Start with your basic tune up procedures. Check your spark plugs, wires, distributor cap and rotor. Check compression, all cylinders should be within 15 lbs of each other. Check carb adjustments. Check for vacuum leaks. Check timing. Check fuel and air filters.

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15y ago
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Q: Chevy 350 runs rough at idle in drive 1983 Blazer K5. It has good acceleration should I concentrate on timing or carb?
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