2001 Toyota Corolla powers down

2001 TOYOTA COROLLA
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LEPERCHRON
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Engine Performance problem
2001 Toyota Corolla 4 cyl Front Wheel Drive Automatic

my car starts to power down more after I have replaced the o2 sensor and also replaced the maf sensor with a refurbished one also went down a street going 60 let off the pedal and it felt like about max 20km when it said about 40-50 km could they both be relate thanks
Jul 26, 2010 at 5:49 PM
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F4I_GUY
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Replacing those sensors is not going to make your vehicle decelerate any differently.

You might have rubbing/seized brakes, or a tire/alignment issue.

Have a good look at your brakes, alignment and tire pressures/tread.
Jul 26, 2010 at 10:52 PM
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LEPERCHRON
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it happens when I Acelerate it sort of loses power but if I push the pedal down it will speed up run a bit then speed up
Jul 27, 2010 at 6:08 PM
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F4I_GUY
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So it happens both with you accelerate and decelerate? Is your check engine light on?

If you this happened right after you installed the MAF and O2, I'd be curious as to if the MAF is faulty (since it is a rebuilt item).

Also, it may be un-related. When is the last time you've done a tune-up? You may just need a good tune-up done.
Aug 11, 2010 at 8:49 AM
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LEPERCHRON
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it did it before but it set a code for the front o2 and then put on an maf sensor after so now I am thinking is it a tps, cat or a wiring problem somewhere
Aug 11, 2010 at 9:07 PM