Question about 2002 Oldsmobile Alero

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2002 Alero wont go over 40 mph

The car starts and runs, but will not accelerate beyond 40 and then just loses power and decelerates.

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I happen to own a 2002 alero, and my wife called me and said the same problem had happened. Change your fuel filter.

Posted on Jul 31, 2009

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Why does it struggle to accelerate beyond 40 mph?


Does it do it hot or cold or both ? Does it skip or miss or buck ?

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Jun 04, 2011 | 2002 Oldsmobile Alero

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here is a OBD2 drive cycle test.

Generic OBD II "Drive Cycle" Most OBD II ("On-Board Diagnostics II") diagnostic monitors will run at some time during normal operation of the vehicle.
However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. The following drive cycle will (theoretically) allow all monitors to run on (??) vehicle. (Note: Drive cycle specifics vary by vehicle!)
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  2. Start cold (below 86°F /30°C) and warm up until engine coolant temperature is at least 160° F (typically requires at least one minute; up to 3 minutes).
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  4. Decelerate without using the brake (coast down) to 20 MPH or less, then stop the vehicle. Allow the engine to idle for 10 seconds, turn the key off, and wait one minute.
  5. Restart and accelerate to 40-55 MPH at 25% throttle and maintain speed for two minutes.
  6. Decelerate with using the brake [or the clutch!] by coasting down to 20 MPH or less, then stop the vehicle. Allow the engine to idle for 10 seconds, turn the key off, and wait one minute.

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2002 alero starts runs and will not go into next gear after 40 mph


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