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Old 09-03-2018, 11:11 AM
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upallnight upallnight is offline
Join Date: Aug 2012
Location: Cook County
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The MAF is there just to tell the computer how much air is being flowed through the intake system. It uses either a hot wire or a hot film that heat up and the air that flow through it will cool the hot wire or hot film. From the amount of time it needs to cool the hot wire or hot film the computer can determine how much air is flowing. The computer uses the air flow to adjust the injection pulse to establish the correct air-fuel ratio.

When you disconnect the MAF the computer is aware that the MAF has been disconnected and will a used a set of pre-determine fuel map to run the engine.

You should get a scanner that can provide real-time data such as short and long term fuel trim, as well as air flow (g/s) from the MAF. Throwing part at it is not the correct way to diagnose the problem.
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