Need A Quick Answer - Toyota Nation Forum : Toyota Car and Truck Forums

Bulldogg1000 · 09-30-2010, 12:14 AM

Alright this is my story,

I have a 2000 Toyota Celica GT. Since I bought the car, it would hesitate, rough idle, and when I floor it or push the gas somewhat fast off a stop it would sound like it hiccuped then it would slowly accelerate. I changed the spark plugs, air filter. I recently got a Check Engine Light and went to autozone to diagnose it. They all came out with Oxygen Sensor and rich fuel. I then cleaned my Mass Airflow Sensor and that didn't help. So what do you think it is? Bad Cat converter, O2 sensor? Both? Thanks Guys. Any input would be awesome

honda d15b7 · 09-30-2010, 08:50 AM

how many k or miles is on the car? what engine is in it?

honda d15b7 · 09-30-2010, 08:52 AM

right now im replacing the engine in a 2001 1.8 vvti, has a bad valve train. will not idle and makes a loud clacking sound, it was ran out of oil.

***Kiwi-Corolla*** · 09-30-2010, 02:36 PM

Quote:

Originally Posted by Bulldogg1000

Alright this is my story,

I have a 2000 Toyota Celica GT. Since I bought the car, it would hesitate, rough idle, and when I floor it or push the gas somewhat fast off a stop it would sound like it hiccuped then it would slowly accelerate. I changed the spark plugs, air filter. I recently got a Check Engine Light and went to autozone to diagnose it. They all came out with Oxygen Sensor and rich fuel. I then cleaned my Mass Airflow Sensor and that didn't help. So what do you think it is? Bad Cat converter, O2 sensor? Both? Thanks Guys. Any input would be awesome

Try testing and replacing the oxygen sensor first. If it's bad then it'll definitely cause problems with the air/fuel ratio. Plus the diagnosis test has determined that as a cause too. If you've got a repair manual, check the specified voltage that sensor is meant to operate at and then test it with a digital multimeter. If the voltage is different to the numbers specified, then replace the sensor.

Bulldogg1000 · 09-30-2010, 09:28 PM

Quote:

Originally Posted by Kiwi-Corolla

Try testing and replacing the oxygen sensor first. If it's bad then it'll definitely cause problems with the air/fuel ratio. Plus the diagnosis test has determined that as a cause too. If you've got a repair manual, check the specified voltage that sensor is meant to operate at and then test it with a digital multimeter. If the voltage is different to the numbers specified, then replace the sensor.

alright ill try that out thanx. And it has 122xxx miles and has the stock 4 cylinder gt engine