Question about 1996 Geo Metro
Pull the valve cover & check the rocker arm adjusting screws
Posted on Jul 24, 2009
You didn't describe the nature of the 'noise' which is probably why you haven't received a prior reply.
If it is missing, it might be injector problems but the injectors themselves are not loud enough to be heard over the other engine noise.
Spark plugs, ignition wiring, fuel filters cannot 'make noise.' Any of those can cause the car to run rough but not cause any specific noise unless it is related to the engine misfiring and in that case, it wouldn't just be a source of noise but also inadequate acceleration and a prominent jerking of the car at low RPMs. Carbon buildup is the likely cause although causing any engine to lug (drive in a higher gear at low speeds) can damage bearings in the engine, creating excessive bearing play and a knocking noise under some conditions. Also, a failed exhaust manifold gasket or associated pipes being cracked can really cause a racket.
Without us hearing the noise, it's kind of hard to diagnose it, but the above might give you some guidance.
Posted on Oct 13, 2008
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Posted on Jan 02, 2017
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