1991 Pontiac Grand 2 5 L Engine Hestitates And Loses Power Driving Uphill

1991 PONTIAC GRAND AM
330,000 MILES
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2.5 L Engine. Hestitates & Loses Power when driving uphill. Changed muffler, spark plugs, fuel filter, catalytic converter. Helped for 1 month and now experiencing similar problem except haven't stalled. Last year changed spark plug wires, fuel pump. Recommendations?
Dec 10, 2012 at 7:54 PM
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