Question about 2000 Toyota Camry

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Acceleration problem Hello, I have a really big problem. I have inherited a 2000Camry from my mom, 4 cylinder, engine replaced last year with a model from Japan,along with the radiator & water pump. It has been slowly goingdownhill since I have had it for the past 5 months. First it startedwith a rough idle at stops, then it started jerking when driving (notoften though). It died out only once, when I was going into work,luckily I was already in the parking lot, but started right up and Iparked. We replaced the cam sensor, but that did not help. That was a few weeks ago. Now, whenever I am ata stop, it jerks like someone is rocking the car. When I accelerate,it has a hard time going into gear, then when it finally does catch, itjerks a little until I hit about 45-50 mph. After I am on the highway,going past 55, it runs smoothly, but will occasionally **** a few timeswhen I accelerate, trying to pass someone or just get up to speed. The new engine hasabout 7-8000 miles on it. As far as I know it has not had an oilchange, or a tune up with the new engine. Someone suggested that maybe the problem, or the maf, or even the timing belt or timing is off and now we're looking into that. Now for the past week, the jerking has stopped, but the idle is really really, rough, also when going slow it is running like a tire is needs to be replaced, or the tires need to be balanced. Thats a new one. Any help would be appreciated.

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The first thing to do is run and OBD 2 code check, any parts store like Auto Zone or Kragen will do this for free, others thing to check are the MAF sensor, clean it by buying MAF sensor spray, CRC makes this product, spray the inside of the MAF to clean out any dirt or dust that may have gotten on the wire element that is the actual sensor, another thing is replace the fuel filter if you haven't done so and check the fuel pressure at the test port on the top of the engine, it is a Shrader type valve, like a tire valve, you will need a fuel injection pressure tester for this, they are cheap, about $20, far less than having a shop do it for $50-$100. If you have codes in the computer (PCM) post them back here and I will help define them and suggest a repair strategy.

Posted on Oct 15, 2008

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Sounds like you are overdue for a real good tune-up...
What I would do is as follows:
Replace the spark plugs with the factory recommended units (important)
Replace the spark plug wires (this is prob the real issue with your hesitation)
Replace the air filter if it is dirty.
Get the auto transmission power flushed.
Change the oil & filter.
Get an "induction cleaning" service performed.
Look for vacuum leaks on the air tube going from the air filter box to the intake manifold.
If the timing belt was off a tooth, the engine would always run bad, it would not improve "at times".
Please advise me if the "Check Engine" light is on for more info.

Posted on Oct 15, 2008

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