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My Truck had a random misfire code and I replaced O2 sensors and I just replaced the EGR valve which seems now like it fixed my problem. After the replacement I have had a loss of power and acceleration. Are there anythings that I can do to help increase power and acceleration?
 

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How old are the plugs, wires, cap/rotor? Maybe just needs a tune-up. Check the fuel filter too. Does it still have a light on for any missfires?
 

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Make sure you use only the a/c delco plugs in that engine. It won't run right if you use a different brand. The gm vortec engines are picky about that.
 
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