Wednesday, December 12th, 2012 AT 7:17 PM
CEL came on and was flashing, shop says it is the 4th cylinder misfiring, new plugs, new wires, new cap and rotor, good compression and the injectors are fine. The shop said that the manifold possibly had too much carbon and that the EGR valve was pushing all of the unused fuel through cylinder 4, causing it to shut down. They bypassed the EGR valve and the CEL went off, but the truck is running rough and has a whooing sound coming from the engine compartment. Do you know what could be wrong with my truck?