Hyundai Repair: 2002 hyundai elantra, hyundai elantra, catalytic converters


Question
QUESTION: In the past 3 months my check engine light started coming on and signal was a misfire in cyl 1.
Than something has been draining the battery, so I disconnect the battery to get around that until I can figure out what it is.

Now my car starts out slow, either in 1st or any other, engine revs up but takes a while to get going. The engine revs to 3000 to 4000 pretty fast. During an extended time of driving, this a burning smell comes from under the hood around the belts area. The belts all seem tight and fine.
5.  Does engine rpm raise during the shift and then come back down to normal? yes
6.  Does engine rpm raise during the shift and then stay abnormally high? yes
7.  Is the shift harsh? no

ANSWER: Hi, Thomas.  The questions and answers attached confuse me a little.  Was I discussing this or another problem with you and asked those questions, or were they from another person's question?  If the former, please refresh my memory of the discussions we've already had.

If you indeed have a misfire, that will affect acceleration and cause the catalytic converter to overheat.  It'd be my presumption that the lack of power and burning odor are from damage to the manifold catalytic converter caused by the misfire.  The problem with the converter will cause an especially large lack of power at higher rpm and will cause the transmission to remain in lower gears because you have difficulty reaching the necessary speed for the transmission to upshift to the next gear.

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QUESTION: The last three questions were from another question. Just thought that it would speed up diagnosis. Is the manifold catalytic converter a big and expensive fix?

Answer
Anytime you're looking at replacing a converter assembly, it's going to be expensive.  Catalytic converters require precious metals in them to function properly.  Replacement of the manifold/converter assembly isn't terribly complicated; I'd expect a labor charge of roughly 2 hours.  Most of the cost is in the converter itself, typically several hundred to a thousand dollars.

It'd be my recommendation to have your car checked by a reputable and competent shop before spending that amount of money.  I can neither see nor feel what is occurring with your vehicle, so that will always limit the accuracy of what I tell you.  Considering the potential expense of the repair, it'd be worthwhile investing in professional diagnosis prior to performing repairs.