There is a very loud squealing noise whenever I accelerate at any speed. When I let off the gas it stops but continues as soon as I step on the gas again. And I notice that it starts surging around 50-55. Do you know what could be causing this very annoying problem. We have replaced the Fel-pro manifold gasket, cleaned the EGR valve, the trouble codes are P0102B, P0300B, P0404, P0620C, & P1189C.
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Monday, April 5th, 2010 AT 3:03 PM