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Hello, I have a 2006 Dodge Charger 3.5L V6 with about 65K on it.
About 4 months ago I started noticing some issues with my car. You can see them in this video: https://www.youtube.com/watch?v=X7o3Wih7LAg
The tach fluctuates on start up, the engine whines at low speeds, and the car has trouble accelerating from a stop. These issues are present both when the engine is cold and warmed up.
Now since I’ve been noticing these issues I’ve also tripped the CEL 3 times and each time the code was P1004: Short Runner Valve Control Performance. Each time I’ve had to remove the SRV, clean it out bc it apparently binded up, and then reassemble and each time that fixed the CEL. But the problems noted above are still there regardless of whether the CEL is on or not.
According to my Dodge service manual “The SRV system operates under WOT conditions above 5000 rpm to maximize engine performance. When actuated by the PCM, the SRV solenoid energizes, allowing mechanical linkage to redirect the intake air flow to six short runners. The PCM looks for a current spike when actuating the solenoid. If the spike is not present, the PCM sets the DTC.”
On Snapon’s website they say something different “A short runner valve controls the volume of an intake plenum. By controlling the volume of the intake plenum, the short runner valve regulates the amount of air entering the engine. When accelerating from a stop, a short runner valve decreases the volume of air to allow air to enter the engine faster. As the RPM and load increases, the short runner valve increases the volume of air to allow more air to enter the engine.”
Im wondering whether a bad SRV would be causing the issues noted in the video. I dont see why it would if like my service manual says it only operates above 5k and the issues I’m having are certainly below that. If its not the SRV, does the video clue anyone in to something it sounds like it might be? Thank you for any help you could provide.
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i doubt the whining noise is being created buy the SRV or variable intake actuators, variable intake actuators close off shorter fatter intake runners at lower RPMs too increase the velocity at which air enters the intake, but at higher RPMs at about 5,000RPM as your service manual states those intake runners open too shorter fatter runners as the long narrow ones have become too restrictive, and this allows freeier air flow into the engine sort of increasing barometric efficiency…
in this case if your variable intake runner is binding and not opening like it should you should not notice a lack of acceleration but what feels like a lack of top end power, if it is stuck open then you could be feeling a lack of acceleration but plenty of top end power…
however once again i doubt this is creating this whining noise, there could be a maltitude of things that could be creating the whining noise and i almost doubt it is the engine, check your transmission fluid, what does its level look like, with a chrysler transmission this is done with the vehicle on a level service engine running transmission in NEUTRAL, check its color and its level, i advise checking the power steering fluid level if this car has a hydralic power steering system, starvation of power steering fluid can lead the pump too make that noise and cause a strain on the engine as it has too turn the pump.
i would also do a more therough under hood search of that noise with the hood open and all that
[video]http://https://www.youtube.com/watch?v=6mpNRJ7m-c8[/video][video]http://https://www.youtube.com/watch?v=0UY35PUdv2c[/video]
and also have a look at this
http://www.ericthecarguy.com/faq/solving-automotive-performance-issueshope this was helpful, please keep us posted 🙂
A short runner manifold is good for high end. A long runner manifold produces more torque down low. So, what you have is two manifolds on the same car.
I had a car with a short runner manifold and it was pretty doggy around town. I traded it for new car with the same engine. It had a long runner manifold and I could notice the difference. To solve the high end problem with the long runner manifold they went with a bigger turbo. That works too.
The whine I hear mostly when you are turning the steering wheel. This is just a guess but it could be the power steering pump.
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