Question about 1991 Buick Regal

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My buick regal 2003 wont excelerate it starts

My buick regal 2003 wont excelerate it starts just fine but no matter how much gas i give it the darn thing crawls I cant get it above 20 miles an hour. Could it be the TPS?

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If it feels like you're driving with the brakes on you may want to have the catalytic converter backpressure checked

Posted on Apr 01, 2010

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It could be the TPS, however, It will need to be tested before replacing and trouble codes or engine lights will also be a factor. You should have 12 volts to the TPS power lead. The reference voltage wire (middle wire) should climb from approx.1.0 volt to 5.0 volts when the gas pedal is pressed slowly while reading the voltage,this is done with the key on, but engine not running. If you see a dead spot @ zero volts somewhere after pressing the pedal 1/4 way, than the TPS is not reading throttle position correctly.

Posted on Feb 07, 2010

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It may be the throttle position sensor. You should have a check engine light on in your dash. You will need to have someone plug a OBD II reader in and retrieve the code.
You can spend a LOT of money just putting in one part after another.
Please let me know what you find.

Posted on Feb 07, 2010

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