Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello & Welcome to JA,
This problem can be a faulty EGR valve,EGR valve inoperativer,or intake stopped up to keep EGR froM operating properly. A scan tool can be used to open & close the EGR to see if it is operating properly.
Exhaust Gas Recirculation Valve Replacement (5.0L, 5.7L)
Important: Do not try to disassemble the linear EGR valve. Service only as a complete assembly.
Important: Carefully note the position of the exhaust gas recirculation (EGR) valve before removal. Do not rotate the EGR valve 180 degrees.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Notice: The Linear EGR valve is an electrical component. DO NOT soak in any liquid cleaner or solvent because damage may result.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Just to clarify. First thing in the morning when the truck is cold, it will not make the noise. Only when I get down the road about 3 or 4 miles it will start. It only does it on the first initial load like taking off from a stop light or something like that. The truck never runs rough or anything, it just sounds like there is a leak in a plug wire. I makes a real loud ticking noise only when taking off and stops when you get going. I am pretty familliar with how everything works, I have built several of these engines but this one is really cutting my butt!!
I am not saying it is not the EGR valve but I just wanted to make sure you were clear on what it was doing. In my experience with EGR valves, the engine will usually run rough but mine is not. Is your answer still the same?? P.S. Will a bad plug cause this? Could I have gotten a bad plug when I bought them? They were autolites by the way.