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2000, Chevrolet, engine hesitates & speedometer drops sharply


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laser
New User

May 16, 2010, 8:48 AM

Post #1 of 6 (1747 views)
2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In

Chevrolet Cavalier, year 2000, 2400 cc, automatic, 115,000 miles.

Lately, when I am driving and my foot is on the gas pedal, suddenly the engine seems to hesitate briefly and the speedometer needle drops -- say from 60 to 40 -- for a fraction of a second. The driving speed certainly does not decrease by anything like that. This does not occur when my foot is off the gas pedal.

I brought the car to an expert in fuel injection. He hooked up his computerized sensor and found nothing wrong.

What could the problem be?


nickwarner
Veteran / Moderator
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May 16, 2010, 9:25 AM

Post #2 of 6 (1743 views)
Re: 2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In

When he hooked up his computer to it and it didn't do what its been doing everything tested out good, because the fault wasn't occurring at the time. These intermittent faults can be tough. When this happens, is anything else affected like lights, fan, radio, or is it just the speedometer and the engine having low power?


laser
New User

May 16, 2010, 10:23 AM

Post #3 of 6 (1737 views)
Re: 2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In

He tested the car when it was stationary, although he did race the engine. So far, the problems appears only when the car is in motion.

Nothing else is affected (as far as I know); only the hesitancy of the engine and the speedometer needle drop and immediate recovery. I have not driven at night, so I have no information regarding the lights.


laser
New User

May 20, 2010, 12:12 AM

Post #4 of 6 (1711 views)
Re: 2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In

I brought the car to a transmission shop. As soon as I described the problem, the proprietor said that I had a faulty speed sensor and sent me to a speedometer place. The speedometer man removed the sensor and tested it. It tested OK. Then he put back the same sensor and we went for a spin. The problem has disappeared -- at least for now.

Any explanations?


laser
New User

Jun 20, 2010, 9:21 AM

Post #5 of 6 (1681 views)
Re: 2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In

Speedometer man took out the speed sensor and tested it. It tested OK. He put it back in place and the problem disappeared. It returned after 3 weeks. The transmission man told me to go back to the speedometer man and have him replace the sensor. Speedometer man said I should have the transmission drained and refilled. The transmission man refused, pulled the sensor and found it clean. He put in a used sensor (and ordered a new one), and the problem seems to be solved.


(This post was edited by laser on Jun 20, 2010, 10:01 PM)


Sidom
Veteran / Moderator
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Jun 20, 2010, 4:29 PM

Post #6 of 6 (1675 views)
Re: 2000, Chevrolet, engine hesitates & speedometer drops sharply Sign In


In Reply To
Speedometer man took out the speed sensor and tasted it.

Dude!! If your speedo guy is tasting sensors..... you need to get a new speedo guy!!! I'm sry.....I'm just messing with ya...... I make more typos & grammar mistakes than anyone in here but that one just made me laugh.... Sly Hey thx 4 taking the time to let us know how things worked out for you......Glad you got your problem solved........






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