Adam, what are the two smaller vacuum actuators for? I do have to point out one major issue I found that was totally disregarded in any of the numerous written and video tutorials about pulling and replacing the intake manifold All were otherwise extremely helpful and that has to do with dirt and grime falling into the intake ports during the removal of the manifold. Over time they get carboned up and can hang open causing poor performance. Not that hard of a job. Another thing to keep in mind is that the engine is direct injection, so you are also susceptible to intake valve sludge. Hope my experience here helps someone else as they come across the same situation. Thanks again for your help. Torque spec on intake bolts Is 9Nm which converts to 79.
Too bad the car is out of warranty! No matter how much you try to keep things clean, I believe the layout makes it impossible to keep engine crud from falling in there. Refer to Steps 3, 4, and 5 above to interpret the result of this test. Above approximately 3000 rpm , the vacuum solenoid will be de-energized. Any faults in the wires must be fixed. The result of fixing the Mercedes Benz intake manifold problem, as well as replacing its coils and spark plugs is a car that idles smoother than it ever did 50.
The author is correct about having to replace the entire intake manifold in many cases. Clear the codes and then retest the vehicle for the Error Code P2004. Under about 3000 rpm the vacuum solenoid will be energized. Oct 12, 2017 Intake Manifold runner control stuck open - bank one: - Intake Manifold Runner Binding Or Sticking - Faulty Manifold flow valve - Manifold flow valve harness is open or shorted - Manifold flow valve circuit poor electrical connection There is a factory service bulletin for this problem for 2007-2008 Dodge Avengers. To thoroughly understand what is going on here, first I want to describe what the Mercedes intake system is doing and why variable-intake-runner intake manifolds are becoming such popular engine parts in modern cars. Thoughts on repair and cost? Other parts can fail as well, including the Mercedes inlet manifold flaps, the actuator mounting arms and the vacuum diaphragms. They are saying now that it could take hours of engine disassembly to actually find the issue and have quoted a new engine at 40 grand.
Usually misfires after this repair is due to improper gasket seal. Labor prices vary far too much to be able to accurately quote here. Do you know what a wiring diagram is an how to read one? Is this a situation that can be repaired or does the entire manifold need to be replaced? I suppose one could replace the front vacuum actuated pivot arm with the upgrade part without removing the intake bit that would require removing the secondary air pump and cutting out the engine lift eye in front of the intake which I would not recommend. If it does fluctuate, repair or replace the connector. Many of these intakes also have specifically shaped flaps that cause a vortex, adding even more efficiency. It can be a total mess otherwise. Failure to gain at least a basic understanding of this system more often than not leads to confusion, misdiagnoses, and the unnecessary replacement of parts and components.
Jan 10, 2018 This Code means that the Intake Runner Control on Bank One is stuck closed. This can cause serious engine damage, and potentially engine failure. I think I will need manifold gasket too? But then I started poking at the intake flap arms. If this were my car, I would absolutely be following the same path. He shook his head and said that the plastic cam actuator breaks because the tumbler flap rail warps. I first swapped coil 1 and 2 and went back for a re-read. Check all your air intake pipes and hoses by bending and flexing them to make sure there is no crack letting unmetered air getting in behind the mass airflow sensor, and change your spark plugs.
The image below shows the typical layout of the main components of an intake manifold air control system. The system is designed to increase or decrease air flow into the engine cylinders. This engine has the added disadvantage of having direct injection, which by design will dump hot oil vapor into your intake manifold without the cleaning properties of gasoline spraying onto the ports. While not an official recommendation, I think Seafoam might be worth a shot. We offer the Genuine Mercedes manifold for many hundreds cheaper than our competitors. If you had to replace the intake manifold, chances are the throttle body is a little gummed up too. The pressure wave will ricochet back up into the intake manifold until it hits the back, where it will bounce back down the runner.
Be sure to identify them all, and make sure they all work as intended. If you have a 4. I highly suggest replacing the entire manifold and never having to deal with it again or repeatedly pay for his labor , our price is the best on the internet for the kit, and the part is Genuine Mercedes, not aftermarket. The less air requires less fuel and will give you less power for less demanding situations like cruising at a steady speed or idling. It is important to have the P2004 trouble code inspected and repaired as soon as possible. Everything is brittle at this age.
The down side to the job are the insanely pathetic design of the intake gaskets and the provisions where they are supposed to snap on to the intake. Even though you have the V8, the intake manifold on your car is simply a scaled up version of the V6 manifold, which also suffers the same issues with runner flap hangups and snapped plastic pieces. An intake runner is a part which acts like a gate and diverts airflow inside the Intake manifold. The plates then open and close to allow or restrict air from entering into the intake system. Hey Adam,in hindsight the job was pretty easy,it looks kind of daunting opening the hood and seeing wires and hoses everywhere,the first thing i disconnected was the air pump and promptly broke the clip,i thought this was setting the stage for what was to become a bad day under the hood,fortunately this would be the only one to break but it had me nervous with every next one,some dont come apart so easy and its a fine line on how much to squeeze,pull and pry. It is rare for this code to be caused by a failure of the mechanism s inside the inlet manifold. I am hoping it it a solenoid of some sort but after reading this forum I am quite concerned.