It was not leaking at the gasket between the EGR valve and the engine. It was leaking from the middle of the EGR part itself, in the center rod part. The EGR valve does have another paper like gasket there but its an internal gasket in the middle of the EGR valve. I had the same issue with my 04 civic. it's a common issue. it's actually the plastic plug on the side of the valve cover. you have to take the EGR valve off to get to it. so you need to order the plastic plug and an new egr gasket. the hardest part was getting the egr valve off as it's a bit of an awkward angle.

Causes of bad compression can be piston rings or valve stems/seats wich can be ruled out or confirmed with a squirt of oil during a compression test, if the compression increases after some oil in the cilinder its due to bad piston rings Turbo can be checked on axial and radial play/ excessive oil in the intercooler or just a noisy turbo.

For a P0401 (insufficient flow) or P0402 (excessive flow) the PCM will monitor the following components during the test sequence shown above: EGR valve pintle position – if the EGR valve is electrically controlled. MAP sensor – if the EGR valve is vacuum controlled the PCM will read changes in the MAP sensor output in response to exhaust
If the EGR cooling system develops a leak, water can escape into the recirculating exhaust gas, and pass through the engine, and disappear out the exhaust pipe, with virtually no symptoms, except of course for gradual coolant loss, the cause of which can be hard to diagnose. The loss is easy to identify. Where it’s being lost … not so much. The ford PCV system sucks. We all know that, but here's why. There is a nipple coming off of the valvecover that has a hose running to the throtle body. This is were the problem lies! See, when under vacuum, say at idle, the PCV is sucking (20 inches of vacuum on my car) all the air it can out of the crankcase, BUT becuase that little hose is
1) Worn Seals or Gaskets. If your vehicle has worn out or damaged crankshaft seals or valve cover gasket, then it will likely be leaking oil. Once that happens, your engine will be losing oil whenever you’re driving. This means you will need to constantly top off the engine oil to avoid engine damage.
3. Exhaust Manifold Failure. Exhaust manifolds bolt up to the engine cylinders and the exhaust system. They transfer used engine air to the exhaust system where it is then released into the atmosphere. On the Triton 6.8, the bolts or studs that connect the manifold to the engine block are prone to rusting and failing.
The disconnection of an EGR vacuum hose affects the efficiency and stability of the engine. When it leaks, it can make the EGR valve not open, increase the emission of harmful gases and also cause overheating in the engine. Below are some of the performance problems that are caused by the disconnection of the EGR vacuum hose: It should be noted
Disadvantages of Having a Bad EGR Valve. A bad EGR Valve causes strains in the operation of the EGR system. These strains inform performance issues like; 1. Power Reduction. The more an engine is exposed to overheating from a fault with the EGR, the more its power for efficiency and longevity reduces. 2.
The bottom line is that a bad EGR valve can ruin the air and fuel mixture in the car. If the Engine Control Unit (ECU) can’t compensate for this, then it will result in performance issues. 2. Fuel Smell And Increase In Fuel Consumption. A bad EGR valve can cause the engine to use more fuel. This usually happens when the EGR valve is stuck
Lubricating Oil will start leaking into the combusting chamber, as a result of engine overheating. The engine will now start running on oil instead of fuel. The driver might not be able to stop the engine again once it has gotten to this. The engine will then exhaust the oil and end up breaking down. Can a bad EGR valve cause overheating
4) Bad PCV Valve. A faulty PCV valve may allow excessive oil into the intake manifold. This oil is then sucked into the combustion chamber and burned with the rest of the air-fuel mixture. Bad PCV valves are typically inexpensive, easy to access, and easy to replace. One way you may be able to test the valve is to shake it.
EGR valve: $332 to $413; Vacuum leak: $90 to $125; DIY Steps to Diagnose Code P0401. Engine code P0401 could be caused by a number of things, including a clogged EGR valve, a faulty EGR temperature sensor, or an engine vacuum leak.
Valve Cover Gasket Replacement Cost. Expect the valve cover gasket replacement cost to be between $90 and $400, depending on what type of vehicle you drive. You will find new valve cover gaskets for $40 to $50, with the majority of the cost spent on labor. To replace the valve cover gasket, labor could be $50 to $350.

This can lead to overheating and potential engine damage. 3. Decreased fuel economy. A faulty EGR cooler can cause the engine to run less efficiently, resulting in decreased fuel economy. 4. Increased exhaust smoke. A failing EGR cooler can cause an increase in exhaust smoke, particularly white or blue smoke. 5.

Some of the same engine performance problems which are indicative of an EGR valve failure can also indicate problems in other parts of the system. This can include the likes of faulty spark plugs, spark plug wires, fuel filters, fuel pump regulators or engine sensors. Some of the most common problems are detailed below: Increased hydrocarbon
Raised temperatures inside the combustion chambers, poor car performance, frequent stalls, strong fuel smell, knocking engine noises, and more are clear symptoms of the EGR valves getting stuck. Most are visual/physical indicators, meaning even beginners should recognize these signals at first glance. On some vehicles, a failing camshaft sensor may lock the transmission in a single gear until you turn off and restart the engine. This cycle may repeat intermittently. If the sensor begins to fail while your car is moving, you may feel the car jerking while losing power. You may experience a noticeable loss of engine power. .