Question about 1999 Chevrolet Blazer

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My 1999 chevy blazer has no power

Tonight on freway i could not get my truck to go faster then 45 50 mpg

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  • Chevrolet Master
  • 3,433 Answers

Let's work on the speed and not mileage ? Two things . First the catalytic converter. Check for smell of sulpher or rotten egg coming out of tail pipe. When engine is turned off the exhaust should stop immediately stop coming out of tailpipe. Use a tissue to detect any slow exhaust you can't feel.
The second item would be the MAF sensor. It tells the ecu how much fuel is needed proportionate to air flow. Make sure your air filter is clean. It's the first sensor in the intake duct coming out of air filter. Good luck.

Posted on May 23, 2009

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  • Chevrolet Master
  • 1,348 Answers

Check the wiring to the airflow sensor located on the hose that goes to the throttle body.check the vacuum lines,and the idle air controller,the throttle position sensor.and the coolant temperature sensor.check the egr valve is not stuck,the catalytic converter plugged if you have a sulfur smell,and the fuel pressure,and the fuel filter.there is also an ignition module cap and rotor.and maybe a bad spark plug if it is idling rough

Posted on May 23, 2009

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Posted on Jan 02, 2017

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