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Map sensor 4 3 vortec.
Sometimes a malfunction in the map sensor or its circuit will trigger the check engine light cel.
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The pumping motion of the pistons causes a constant change of pressure in the intake manifold.
If the map sensor starts to fail these are some of the most common symptoms.
Not sure if its the problem starts and idles fine push on the gas and it starts to rev than cuts out bogs down let go of the gas and goes right back to a good idle.
The 4 3 vortec engine or vortec 4300 is a 6 cylinder small block that was introduced in 1985 and continued in production until 2014.
The manifold absolute pressure map sensor monitors this and reports the information to the engine s computer.
The vcm uses the map sensor to control fuel delivery and ignition timing.
Scanning the computer you may find a p010x series of codes stored in memory.
Posted by anonymous on oct 31 2009.
The mass air flow maf sensor part of your vehicle s electronic fuel injection system is responsible for calculating the total amount of air entering the engine.
Manifold absolute pressure sensor map 213 796 16187556 12569240 12614973 compatible with chevy buick cadillac gmc gm saturn oldsmobile hummer isuzu pontiac bonneville saab 4 3 out of 5 stars 360.
Troubleshoot and test codes.
1999 4 3 vortec map sensor removal install does it just pop out.
Symptoms of a bad map sensor.
P0105 and other map trouble codes.
Lb1 1985 1986 primarily in c k trucks lb4 1985 1995 in the s10 el camino and other non truck vehicles.
P0108 obd ii or codes.
Multimeter map sensor test.
See figures 1 2 and 3.
Typical manifold absolute pressure map sensor wiring diagram wire color terminal identification location may vary on certain models backprobe with a high impedance voltmeter at map sensor terminals a and c.
Testing the map sensor.
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A faulty maf sensor can cause your vehicle to run too rich or run too lean.
These parts can cost up to a 100 buck or more and a can of mass air flow sensor cle.
You ll notice if the tailpipes eject black smoke or when the engine runs rough or backfires.
At its core an internal combustion engine is a vacuum pump.
Over its nearly 30 year production history the 4 3l vortec went through a number of revisions and upgrades.
