What are the symptoms of an intake manifold air leak?

2 Answers
TravisDella
07/24/25 4:43pm
The symptoms of an intake manifold air leak include engine shaking, unstable idle, weak acceleration prone to stalling, and failure to start the vehicle. A car requires both air intake and exhaust. Below is a detailed introduction about the automotive exhaust system: Overview: The automotive exhaust system primarily discharges waste gases produced by engine operation while reducing exhaust pollution and noise. Vehicle noise sources can generally be categorized into engine noise and chassis noise. Additionally, the automotive exhaust system is mainly used in motor vehicles such as light-duty vehicles, compact cars, and buses. Other Information: The automotive exhaust system refers to the system that collects and discharges waste gases, typically consisting of the exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, automotive muffler, and tailpipe.
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VanKatherine
08/11/25 9:16am
I think intake manifold leaks are quite common while driving. The symptoms are obvious - the engine shakes violently at idle, like the car is shivering, and it lacks power during acceleration with no response when pressing the gas pedal. Fuel consumption also increases ridiculously. I used to refuel twice a month, but now it might take one more time. Additionally, starting the engine becomes difficult, requiring multiple attempts before it fires up, and the engine management light may come on as a reminder to check. There might be a hissing sound from the leak, especially audible during cold starts. Leaving it unrepaired long-term could damage the engine, not to mention wasting fuel, and it's dangerous on highways. Better get it fixed at a professional shop ASAP - don't underestimate this issue.
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