engine runs erratic and extreme loss of power

Asked by Jan 03, 2014 at 05:46 PM about the 1992 GMC Sierra 1500

Question type: Maintenance & Repair

new plgs,wires,cap and fuel filter.all sensors read good.checked for vacuum leaks and
seems to be getting plenty of fuel.

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236,935

Was this before all the parts were changed or after?

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