Question about Cars & Trucks
MAP = mass air pressure, Baro is atmospheric air pressure ( as in barometer), VAF = volume air flow and MAF = mass air flow . The baro sensor alters the air fuel mixture for varying altitudes that the vehicle can travel through. IE from flat plains at sea level to over the rockis.. The VAF sensor measures the volume of air passing through the air intake . The MAF measures the combination of volume and the density of the air flowing through the air intake to adjust the air fuel mixture as cold air is more dense and requires more fuel to burn completely. The MAP measures the vacuum in the manifold after the throttle control to adjust the air fuel mixture in over run situations so that the car will not backfire. All these sensors continually supply input to the ECM which continually compares them with the O sensors and adjusts the injector pulse to ensure complete burn of the mixture in all situations and engine rpm's.
Posted on May 13, 2014
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Posted on Jan 02, 2017
Possible the coil code is a "leftover" if you did not clear the codes after changing what you did. You can clean the internal wires on the air flow sensor with a Q-tip and some carb cleaner. the map sensor can be tested by following instructions in either haynes or chilton manual. Don't replace anything till you do testing. And of course, check the vacuum lines for damage...any cracked or disconnected will cause whatever they are attached to, to not work.
Posted on Sep 03, 2009
Your corolla doesn't use a MAF sensor, it uses a MAP sensor
The map sensor is located on the Intake Manifold right by the throttle body. That could easily be causing the issue you're stating.
Posted on Mar 01, 2011
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