BWD Manifold Absolute Pressure Sensor

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This BWD MAP Sensor - part# EC1636 is vehicle specific. For assisting you further on locating the MAP sensor, please provide the year, make, model and engine size of the vehicle. You may also visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

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Sorry, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

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Symptoms of malfunctoning MAP (Manifold Absolute Pressure) sensor: The most obvious sign of a faulty MAP sensor is that the engine computer will send out a diagnostic code causing the "Check Engine" light to come on. However, sometimes an engine code will incorrectly indicate a faulty MAP sensor. This is commonly caused by a leak in a vacuum hose or port attached to the intake manifold. Prior to replacing a MAP sensor, inspect the vacuum lines and repair them as necessary. POOR ENGINE PERFORMANCE: If a MAP sensor is not sending the correct signals to the engine computer, an imbalance of pressure may result in rough engine performance. This will be most noticeable during acceleration or slowing down, as these are the times when there is the greatest difference between atmospheric pressure and the pressure within the manifold. A rough idle is a common manifestation of faulty MAP readings. INCREASED EMISSIONS: If the vehicle was found to release an excess of emissions and other causes have been ruled out, the cause may be a faulty MAP sensor. ENGINE SURGING: A faulty MAP sensor may result in poor synchronization between the air intake and the release of gasoline from the fuel injectors. Delayed acceleration followed by a sudden surge is a common sign of this type of problem. FOULED SPARK PLUGS: If the engine does not properly regulate the flow of air, the engine will regularly run LEAN or RICH. This refers to the engine performance in relation to whether the fuel is burning with too much or too little oxygen. While an engine running "LEAN" will experience depleted horsepower, an engine running "RICH" will be obvious from an inspection of the spark plugs. The spark plugs will become fouled, meaning that they are coated with residue resulting from inefficient combustion.
For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.
For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

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The codes P1635 and P1639 are saying the 5 volt reference is shorted to volatge somewhere. If you have access to a scan tool to view computer live data, plug it in and turn the vehicle on. It should be fuel level sensor,the map sensor,the egr pindle,throttle position and the fuel tank pressure showing high voltage. First scan the engine while running for what do these all read for volts. Secondly just turn the key on and turn the key off for one minute then turn the key on and look quickly to see if any show very high voltage for 2 seconds then drop down.

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The MAP sensor should be located next to the air filter on your Chevy blazer.

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Unfortunately, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis.

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Yes, the MAP sensor should be the problem, However I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem.

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yes

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The MAP sensor may be the problem. However, I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem.

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The instructions on changing the MAP sensor has been mailed to the mail address provided.