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Trying to fix my mom's car has the cel code above I can hear a hissing sound coming from behind the engine if I remove the supercharger cover. I'm assuming it's a v8 since it's supercharged. I tried spraying water around the area but can't get a idle change f I watch the fuel trims it doesn't improve with rpm so what ever it is is constantly leaking. Don't know if it's vacuum or pressure but I'm assuming vacuum since the ECU is reading excess air. I attached some freeze frame data pids. Thanks for the help in advanced.
I was finally able to find the vacuum leak theres a pipe about an 1¼" diameter with ribs. Found a small crack where it connects behind the super charger. You can see where I put some gasket maker to help seal. Any one know what this pipe goes to?
Symposer
Historically, automobile manufacturers have focused on
reducing the level of engine acoustics within the cabin.
With the introduction of the new 5.0-liter V8 engine,
development engineers have deliberately accentuated the
acoustic feedback into the cabin in an effort to further
increase the driving experience.
An integral part of this development is the introduction of
a symposer into the engine air intake system of the SC
engine. The symposer is mounted on the rear of the engine
and is connected directly to the RH intake manifold.
Engine order pulsations from the intake system are fed
into the symposer, which picks out the pulsations that are
within the target frequency range. These accentuated V8
engine acoustics are then directed into the cabin.
The symposer is a mechanical device that is operational
when the engine is running. However, a vacuum operated
valve, which is controlled by the ECM, only allows the
acoustics into the cabin under certain conditions. This is to
achieve the desired engine sound quality in the cabin.
12-23-2023, 09:26 PM
P2187,p2189 too lean at idle
