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An exhaust leak can definitely cause rough idle, but only if the leak is located before the upstream o2 sensor Discover how a bad exhaust system can lead to decreased engine performance, increased emissions, excessive engine noise, and reduced fuel efficiency If you suspect that the exhaust leak is causing your engine to run rough at idle, then consider taking your car to the mechanic asap.
The only way an exhaust leak can cause a rough idle is if the leak was in a place where it could enter the air intake system But i can't see how a leak in your exhaust can possible cause it. In most cases the leaks are on the sides of the engine or in the rear of the engine where the exhaust manifolds attach to the engine, or the point where the exhaust pipes attach to the exhaust manifolds.
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. Yes, a bad exhaust can cause rough idle by disrupting engine backpressure and airflow
Engine performance and idle stability may suffer as a result. 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. An exhaust leak can be hard to find and difficult to fix, but it's worth finding out if it's the source of your problems
If you suspect that your car has an exhaust leak, start by taking a look under the hood and listening carefully while idling in neutral.
Going to change out the exhaust gaskets today and hopefully fix the idle issue Ran seafoam through a vacuum line yesterday and it looks like it's leaking between the end of the manifold and the pipe that's bolted to the side of the tranny. Anyone know how small an exhaust leak can be and cause erratic idle I recently (a few months ago) made the mistake of letting a local machine shop (rhymes with larry's) surface my exhaust manifold before i installed my head
I was kind of unsure about doing this because the in. A rough idle is one of the hardest things to diagnose because it can be caused by mechanical, electrical, fuel problems, or vacuum leaks
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