Question about 2001 Toyota Corolla

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Zero throttle response and sluggish accelertation

I have a 2001 corolla that has about 115000 miles on it. Just over a week ago my check engine light came on. My mechanic said it was the code for the oxygen sensor, which he replaced. After having the part replaced my car had better acceleration than it had in a few years. Two days after my mechanic replaced the O2 sensor my car start to randomly have zero throttle response. My mechanic cleaned some parts but the same thing happened. The check engine light came on again, this time for the mass air flow sensor, which was still under warranty and replaced for free. This did not fix the problem either. In fact the problem is getting progressively worse. Acceleration is terrible and starting from a complete stop, especially in the first half hour of driving, is a fun little game of will the car go or will it not go... The problem seems worse when accelerating slowly. Any ideas of what could be wrong? I have my mechanic looking into the EGR sensor, fuel injectors, and the throttle body.

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Wow, great description...I suspect the catalyst is bad...(in the exhaust) but try this cheap fix.
go to Advance Auto Parts and buy a can of "SeaFoam" ($8) and following the directions add to fuel and drive for at least 100 miles...see if that helps...if not, have a mechanic look at the catalytic convertor/exhaust
Good Luck

Posted on Jun 15, 2009

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Toyota carola1999 when you start up it revs and then ticks over and starts reving up again

Posted on Feb 20, 2010

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