Question about 1996 Chevrolet Cavalier

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Engine light blinking is it because i need a new muffler

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No. its blinking because the engine is misfiring so bad that it is damaging the cat converter. the converter may already be bad, but you need to fix the misfiring problem or it can damage the new converter.

Posted on Jun 04, 2010

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Van is sputtering


Hello Eric Tillman,

My favorite (after assuring fuel & fire) is of course the EXHAUST SYSTEM...

A collapsing catalytic converter or rotted muffler can very easily plug your engine tighter than a tick...

I have never found a SNAPPY way to test for this
(open exhaust at bottom of manifold... if it starts... you know what YOU MUST FIX BEFORE running it.

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The ECU doesn't usually detect muffler issues since they are located beyond the emissions portion (mufflers are essentially for noise not emissions) Mufflers usually have small holes located on the lowest rear-most part to allow condensation to escape. If the holes are big enough for a pencil to fit in, yes you have rusty mufflers. They aren't the problem most likely, but that rust indicates age and poor condition of the entire emissions system. Most issues are in the form of leaks (vaccum or EGR) or sensors O2, MAP or MAF, or you could have a clogged catalytic converter all can be checked by a reputable mechanic if you are overwhelmed.

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Difficult to start up sounds sluggish, once shut off, won't start, coil was hot (coil recently replaced). Needs new muffler.


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Engine Back fired, blew out muffler.


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