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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Re: Zero throttle response and sluggish accelertation
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
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The oil change wouldn't cause this problem. There are many emission sensors in the car that will make the engine light come ON. Best way to find out what's going on is to have an auto-parts store hook up a engine code reader and tell you what the code means. Most auto-part store will do this for free.
If your catalytic converter is "below efficiency" or otherwise clogged, you will lose power as you drive and the vehicle heats. The more you drive the vehicle, the worse the problem will become. The exhaust can't escape properly through the catalytic converter, therefore your engine won't run properly. Your issues are related, and if you replace your catalytic converter they should go away.
Hey, The problem is NOT a crankshaft sensor or a TPS sensor. It is most likely the distributor. If it is not givin you a check engine light or shooting a code then its is your distributor. This just happened to my 2000.. how many miles you got on it, you like it? I got it 2 weeks ago, then on the highway it seemed to lose the response from the accel. But it would sometime drop back into gear and I could drive for another 20 second and then it was dead. So let me know if this helps....
You need to do a compression test on the engine cylinders. It appears one of the cylinders is not firing and dragging the rest of the engine down in power. The compression test will show if one of the cylinders has a problem.
Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the Check Engine or Service Engine Soon lights to tell you that there is a problem and you should have the car diagnosed and repaired. Not fluid related, but could be a small problem that's easy to fix now. Even a loose gas cap can turn the light on. Have a code scan, that's the starting point.
115000 miles on a Benz is not a lot of mileage provided the car was serviced on time and properly. You might want to have someone run a scan for trouble codes to see why the light is on. It could just be a bad 02 (oxygen) sensor. Does the car run OK?
it could be that your fuel pump could be weak. or that it's in the electrical circuit of your fuel system. what that means is that the sensors that help read the performance of your fuel system could be malfunctioning. this would involve the O2(oxygen) the TPS(throttle position sensor. or it could be the fuel pressure regulater. you could probably go to a small garage and have scan done cheaper than if you take it to a dealership.hope this helps please rate this ......thanks and good luck