2001 Geo Prizm catalytic converter

2001 GEO PRIZM
158,000 MILES • 4 CYL • AWD • AUTOMATIC
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SHIRLEY4FFA
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Okay my car is actually a chevy prizm. It has a check engine light on and when it was tested it said it was the catalytic converter. I just had that replaced in Feburary of 2008. Now the mechanic has pulled it off(it is one that has to be welded) and said nothing is wrong. There is obviously something wrong with my car because when i try to take off from a light or a stop sign it hesitates so much so that sometimes i have to floor the gas pedal. What else could be throwing this code or should i seek another mechanic?
Aug 14, 2008 at 1:18 PM
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MMPRINCE4000
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Have the mechanic check the O2 sensor output with a scan tool. Also have him perform a backpressure test with the convertor installed, which will give you a better idea if the convertor is clogged versus a visual inspection.
Aug 15, 2008 at 6:07 AM