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The exhaust leak can cause a rough idle if the leak is present close to the oxygen sensors A muffler with holes or cracks can cause exhaust gases to escape prematurely, disrupting the engine's performance The common places where exhaust can occur are exhaust manifolds, flex pipes, and exhaust manifold gaskets.
I have an exhaust leak on my 2002 316i somewhere in the middle of the car and the car sometimes starts hard and sometimes completely normale and the idle sometimes fluctuates Discover how a bad exhaust system can lead to decreased engine performance, increased emissions, excessive engine noise, and reduced fuel efficiency Could the exhaust leak be the problem maker?
Hearing annoying noises from under the car
An exhaust leak could be the culprit Exhaust leaks may allow harmful gases into the cabin while reducing engine performance and fuel economy In this article, we'll cover five key symptoms of an exhaust leak and whether or not it's safe to continue driving until you get the leak repaired. An exhaust leak can definitely cause rough idle if the leak is located before the upstream o2 sensor or very close to it
The exhaust leak will set off a false lean condition, to which the ecu responds by increasing fuel delivery. If the leak is anywhere between the cylinder head and the o2 sensor (actually, even a little bit past the o2), then, yes, it can It throws the o2 sensor's reading (and, therefore, the fuelling) off Cis, while quite reliable, is extremely sensitive to intake/vacuum leaks
Check (or just replace) things like.
A rough idle is just like a normal idling engine speed, except it is irregular and not as smooth as we've become accustomed to with our modern, smooth engines You have a rough idle if you feel the roughness when your car idles, but drives smooth. Yes, an exhaust manifold leak can cause a rough idle This is because the leaking exhaust gases mix with the air and fuel in the cylinders, resulting in a misfire or uneven combustion
This causes engine vibration and poor performance during idling which translates to a rough idle. An exhaust manifold leak can cause all sorts of problems with your engine, and a rough idle is just one of them If you're experiencing a rough idle, it's important to get your car checked out by a mechanic as soon as possible to see if an exhaust manifold leak is the culprit.
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